'Lessons' in the Bible

Then He proceeded to teach them many lessons in figurative language; and in His teaching He said,

But these are not the lessons which you have learned from Christ;

If you warn the brethren of these dangers you will be a good and faithful servant of Christ Jesus, inwardly feeding on the lessons of the faith and of the sound teaching of which you have been, and are, so close a follower.

Be mindful, therefore, of the lessons you have received and heard. Continually lay them to heart, and repent. If, however, you fail to rouse yourself and keep awake, I shall come upon you suddenly like a thief, and you will certainly not know the hour at which I shall come to judge you.