Matthew Henry on Judges 13:8-14

Blessed are those who have not seen, and yet, as Manoah, have believed. Good men are more careful and desirous to know the duty to be done by them, than to know the events concerning them: duty is ours, events are God's. God will guide those by his counsel, who desire to know their duty, and apply to him to teach them. Pious parents, especially, will beg Divine assistance. The angel repeats the directions he had before given. There is need of much care for the right ordering both of ourselves and our children, that we may be duly separate from the world, and living sacrifices to the Lord.