Commentaries:
Paul had reason to entrust Timothy with the church's doctrine: He had been trained in the scriptures, in a Christian way of life, by his grandmother Lois and his mother Eunice. He was a third-generation Christian, and he had the training that gave him the background to be an evangelist within God's Work. How extensive and personal his training was is open to question. At least he had a form of the right kind of training.
John W. Ritenbaugh
Guard the Truth!