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Speratus said;
Christ the Man is incapable of holiness since holiness is purely a divine attribute. And we are lost because we can never be holy. In His state of humiliation, Christ did not always use His divine powers (Phil. 2:5-8), but He never became capable of sin. He could never deny Himself (2 Tim. 2:13).
So you deny the holiness of Jesus—the man. How sad that you have no true Redeemer. IF holiness is ONLY a Divine attribute (only owned by God, not man, even Jesus) then WHY does the Scripture give us mere mortals commands to be holy and even call us holy? (Exodus 22:31, Isaiah 62:12, Luke 1:70, Romans 11:16, 12:1-2, 1 Corinthians 7:14, Hebrews 3:1, 1 Peter 1:15-16, etc.). Have you ever read what the Apostle Paul wrote in?

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Colossians 1:21-22:

And you, being in time past alienated and enemies in your mind in your evil works, yet now hath he reconciled in the body of his flesh through death, to present you holy and without blemish and unreproveable before him:

Colossians 3:12:

Put on therefore, as God's elect, holy and beloved, a heart of compassion, kindness, lowliness, meekness, longsuffering;
Jesus was/is/and will always be holy, however this does not mean He was never legitimately tempted not to be holy. Christ’s temptations were real, not imagined.

Now, what you have declared is that YOU do not have a holy Redeemer. However, Jesus, the MAN, had to be holy in order to redeem any from sin (Hebrews 7:26), but this YOU deny by saying, “Christ the Man is incapable of holiness since holiness is purely a divine attribute,” thus improperly separating Christ’s two natures and placing more emphasis on His Divine, rather than balancing His Divine and Human natures. However, the Scripture states that the Mediator between God and man must be sinless. Christ, who was to offer Himself unto God as a sacrifice for the sins of His elect, must be Himself free from sin—He must be HOLY (Hebrews 4:15; 1 Peter 2:22). As Hodge states,

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A sinful Saviour from sin is an impossibility. He could not have access to God. He could not be a sacrifice for sins; and He could not be the source of holiness and eternal life to his people. This sinlessness of our Lord, however, does not amount to absolute impeccability. It was not a non potest peccare. If He was a true man He must have been capable of sinning. That He did not sin under the greatest provocation; that when He was reviled He blessed; when He suffered He threatened not; that He was dumb, as a sheep before its shearers, is held up to us as an example. Temptation implies the possibility of sin. If from the constitution of his person it was impossible for Christ to sin, then his temptation was unreal and without effect, and He cannot sympathize with his people.
It may assist you to read the WCF and prayerfully understand it:

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The Westminster Confession of Faith, Chapter VIII Of Christ the Mediator

I. It pleased God, in his eternal purpose, to choose and ordain the Lord Jesus, his only begotten Son, to be the Mediator between God and man,[1] the Prophet,[2] Priest,[3] and King,[4] the Head and Savior of his church,[5] the Heir of all things,[6] and Judge of the world:[7] unto whom he did from all eternity give a people, to be his seed,[8] and to be by him in time redeemed, called, justified, sanctified, and glorified.[9]

1. Isa. 42:1; I Peter 1:19-20; John 3:16; I Tim. 2:5
2. Acts 3:20, 22; see Deut. 18:15
3. Heb. 5:5-6
4. Psa. 2:6; Luke 1:33; see Isa. 9:5-6; Acts 2:29-36; Col. 1:13
5. Eph. 5:23
6. Heb. 1:2
7. Acts 17:31
8. John 17:6; Psa. 22:30; Isa. 53:10; Eph. 1:4
9. I Tim. 2:6; Isa. 55:4-5; I Cor. 1:30; Rom 8:30

II. The Son of God, the second person in the Trinity, being very and eternal God, of one substance and equal with the Father, did, when the fullness of time was come, take upon him man's nature,[10] with all the essential properties, and common infirmities thereof, yet without sin;[11] being conceived by the power of the Holy Ghost, in the womb of the virgin Mary, of her substance.[12] So that two whole, perfect, and distinct natures, the Godhead and the manhood, were inseparably joined together in one person, without conversion, composition, or confusion.[13] Which person is very God, and very man, yet one Christ, the only Mediator between God and man.[14]

10. John 1:1, 14; I John 5:20; Phil. 2:6; Gal. 4:4
11. Phil. 2:7; Heb. 2:14, 16-17; 4:15
12. Luke 1:27, 31, 35; Gal. 4:4; see Matt. 1:18, 20-21
13. Matt. 16:16; Col. 2:9; Rom. 9:5; I Tim. 3:16
14. Rom. 1:3-4; I Tim. 2:5

III. The Lord Jesus, in his human nature thus united to the divine, was sanctified, and anointed with the Holy Spirit, above measure,[15] having in him all the treasures of wisdom and knowledge;[16] in whom it pleased the Father that all fullness should dwell;[17] to the end that, being holy, harmless, undefiled, and full of grace and truth,[18] he might be thoroughly furnished to execute the office of a mediator, and surety.[19] Which office he took not unto himself, but was thereunto called by his Father,[20] who put all power and judgment into his hand, and gave him commandment to execute the same.[21]

15. Psa. 45:7; John 3:34; see Isa. 61:1; Luke 4:18; Heb. 1:8-9
16. Col 2:3
17. Col 1:19
18. Heb. 7:26; John 1:14
19. Acts 10:38; Heb. 7:22; 12:24
20. Heb. 5:4-5
21. John 5:22, 27; Matt. 28:18; Acts 2:36

IV. This office the Lord Jesus did most willingly undertake;[22] which that he might discharge, he was made under the law,[23] and did perfectly fulfill it;[24] endured most grievous torments immediately in his soul,[25] and most painful sufferings in his body;[26] was crucified, and died,[27] was buried, and remained under the power of death, yet saw no corruption.[28] On the third day he arose from the dead,[29] with the same body in which he suffered,[30] with which also he ascended into heaven, and there sitteth at the right hand of his Father,[31] making intercession,[32] and shall return, to judge men and angels, at the end of the world.[33]

22. Psa. 40:7-8; see Heb. 10:5-10; John 4:34; 10:18; Phil. 2:8
23. Gal. 4:4
24. Matt. 3:15; 5:17; Heb. 5:8-9
25. Matt. 26:37-38; 27:46; Luke 22:44
26. Matt. 26:67-68; 27:27-50
27. Mark 15:24, 37; Phil. 2:8
28. Matt. 27:60; Acts 2:24, 27; 13:29, 37; Rom. 6:9
29. I Cor. 16:3-4
30. Luke 24:39; John 20:25, 27
31. Luke 24:50-51; I Peter 3:22
32. Rom. 8:34; Heb. 7:25; see Heb. 9:24
33. Acts 1:11, 10:42; John 5:28-29; Rom. 14:10b; Matt. 13:40-42; Jude 1:6: see II Peter 2:4

V. The Lord Jesus, by his perfect obedience, and sacrifice of himself, which he, through the eternal Spirit, once offered up unto God, hath fully satisfied the justice of his Father;[34] and purchased, not only reconciliation, but an everlasting inheritance in the kingdom of heaven, for all those whom the Father hath given unto him.[35]

34. Rom. 3:25-26; 5:19; Heb. 9:14; 10:14; Eph. 5:2
35. Dan. 9:24; II Cor. 5:18; Col. 1:20; Eph. 1:11, 14; Heb. 9:12, 15; John 17:2

VI. Although the work of redemption was not actually wrought by Christ till after his incarnation, yet the virtue, efficacy, and benefits thereof were communicated unto the elect, in all ages successively from the beginning of the world, in and by those promises, types, and sacrifices, wherein he was revealed, and signified to be the seed of the woman which should bruise the serpent's head; and the Lamb slain from the beginning of the world; being yesterday and today the same, and forever.[36]

36. Gal. 4:4-5; Gen. 3:15; I Cor. 10:4; Rev. 13:8; Heb. 9:15; 13:8; see Rom. 3:25

VII. Christ, in the work of mediation, acts according to both natures, by each nature doing that which is proper to itself;[37] yet, by reason of the unity of the person, that which is proper to one nature is sometimes in Scripture attributed to the person denominated by the other nature.[38]

37. John 10:17-18; I Peter 3:18; Heb. 1:3; 9:14
38. Acts 20 28; Luke 1:43; see Rom. 9:5

VIII. To all those for whom Christ hath purchased redemption, he doth certainly and effectually apply and communicate the same;[39] making intercession for them,[40] and revealing unto them, in and by the Word, the mysteries of salvation;[41] effectually persuading them by his Spirit to believe and obey, and governing their hearts by his Word and Spirit;[42] overcoming all their enemies by his almighty power and wisdom, in such manner, and ways, as are most consonant to his wonderful and unsearchable dispensation.[43]

39. John 6:37, 39; 10:15-16, 27-28
40. I John 2:1; Rom. 4:34
41. John 15:15; 17:6; Eph. 1:9
42. John 14:26; 17:17: II Cor. 4:13; Rom. 8:9, 14; 15:18-19
43. Psa. 110:1; I Cor. 15:25-26; Col. 2:15; Luke 10:19

Reformed and Always Reforming,