not strive - “The servant of the Lord” must imitate his master in not striving contentiously, though uncompromising in earnestly contending for the faith (Jud 1:3; Mat 12:19).
gentle unto all men - “patient” (Greek, “patient in bearing wrongs”) in respect to adversaries. He is to be gentle so that he may occasion no evils; patient so that he may endure evils.
apt to teach - implying not only solid teaching and ease in teaching, but patience and assiduity in it [Bengel].