In the days of thy youth

Ecc. 12:1 “Remember now thy Creator in the days of thy youth, while the evil days come not, nor the years draw nigh, when thou shalt say, I have no pleasure in them;”

It is an interesting thing that Solomon told youth to remember their Creator. Why is this? Moses was constantly reminding the Israelites not to forget the Lord,

Deuteronomy 4: 23-25 Take heed unto yourselves, lest ye forget the covenant of the LORD your God, which he made with you, and make you a graven image, or the likeness of any thing, which the LORD thy God hath forbidden thee.
For the LORD thy God is a consuming fire, even a jealous God.
When thou shalt beget children, and children's children, and ye shall have remained long in the land, and shall corrupt yourselves, and make a graven image, or the likeness of any thing, and shall do evil in the sight of the LORD thy God, to provoke him to anger

but it usually is in regard to the parents teaching the children.

The young usually think they are invincible. They can get up faster from a fall, and it doesn’t take them as long to heal. Some of these things are no doubt true, but we should not translate that into living in sin while we are young and only worshipping the true God later on in life. We ought to be living soberly and Godly lives now. Matthew Henry’s comment on this passage is worth ending on.

It is the greatest absurdity and ingratitude imaginable to give the cream and flower of our days to the devil, and reserve the bran, and refuse, and dregs of them for God; this is offering the torn, and the lame, and the sick for sacrifice; and, besides, old age being thus clogged with infirmities, it is the greatest folly imaginable to put off that needful work till then, which requires the best of our strength, when our faculties are in their prime, and especially to make the work more difficult by a longer continuance in sin, and, laying up treasures of guilt in the conscience, to add to the burdens of age and make them much heavier.