From my youth; as soon as I was capable of managing my own affairs, and of doing good to others. He was brought up with me, in my family, or at least under my care and protection. As with a father, i.e. with all the diligence and tenderness of a father. I have guided her, i.e. the widow, mentioned Job 31:16, and commonly joined with the fatherless. From my mother's womb, i.e. from my tender years; ever since I was capable of discerning good and evil, I have made conscience of this duty; and this my continuance in well-doing is a good evidence of my sincerity therein.
Related Commentaries of Job 31:18
Job 31:18
18 (For from my youth he was brought up with me, as with a father, and I have guided her from my mother's womb;)