Unity,
I take issue with the statement "knowledge will set you free." What JC actually said was, "If you hold to my teaching, you are really my disciples. Then you will know the truth, and the truth will set you free." (John 8:31,32). So the truth sets us free, not mere knowledge.
What that means is that tree you refer to doesn't "become a tree" once our mind accepts it as such. The tree is a tree, and we can recognize that truth or deny it. There is truth to be found, especially with regards to Christ, and the truth can and will set you free if you find it.
Like so much of the Scripture, taking one verse out of context often ends in mis-interpretation. "Do not judge" did not mean to never tell anyone what the truth is. Jesus Himself commanded his disciples to preach the truth throughout the world. Rather that statement was made in the context of the religious leaders and hypocrite pastors of his day who made up truth so they could have power over others. We are not to judge based on our own truth, but only based on the truth God has revealed. That way God remains the judge, and we are only his mouthpiece. In that case, we, ourselves, are not the judges.
If I'm being an asshole, just let me know and I'll shut the fuck up.