I'm sorry, but I'm a little confused.

From what I know, I am in the belief that it is only by the word that allows the Holy Spirit to work in the sinners heart.

This is what I was trying to affirm by my question.

Is the Preaching, Teaching, and or Reading of scripture the only way to allow the Holy Spirit to work in the sinners heart?

So the preaching/teaching = verbally communicating the word or by reading the word is the only way to allow the Holy Spirit to work in the sinners heart.

I believe that our silent witness is important, but unless the sinner knows the gospel they won't ever come to a saving faith.

Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified. - Galatians 2:16