'Taught' in the Bible

For I neither received it of man, neither was I taught it, but by the revelation of Jesus Christ.

For if I [or anyone else should] rebuild [through word or by practice] what I once tore down [the belief that observing the Law is essential for salvation], I prove myself to be a transgressor.

What then has become of that sense of blessing and the joy that you once had [from your salvation and your relationship with Christ]? For I testify of you that, if possible, you would have torn out your own eyes and given them to me [to replace mine].

Let him that is taught in the word communicate unto him that teacheth in all good things.