I think knowledge in this particular text means knowledge that wont profit us in the kingdom of heaven. Beacause it says it will PASS AWAY . The knowledge in the kingdom of heaven will never pass away. It goes on to say For we know in part and we prohesy in part. So I think it is now talking about knowledge of God. It says ... in part , meaning we obviously dont know all the things of God and wont until we reach heavens gates . The proof of this knowledge that we cannot know and we will then know is proved by the next verse ... but when perfection comes the imperfect disappears this is saying nothing perfect will enter the kingdom of heaven. Then finally one more proof that we have not all knowledge now and we will have plent if not all ( I dont know if we will ever be all knowing) is the end of verse 12 .. Now I know in part then I shall know fully, even as I am fully known.
I hope I have helped you out. I am very young Christian and I am still learning.
