'Years' in the Bible

I explored with my mind how to stimulate my body with wine while my mind was guiding me wisely, and how to take hold of folly, until I could see what good there is for the sons of men to do under heaven the few years of their lives.

Here is what I have seen to be good and fitting: to eat, to drink and enjoy oneself in all one’s labor in which he toils under the sun during the few years of his life which God has given him; for this is his reward.

For he will not often consider the years of his life, because God keeps him occupied with the gladness of his heart.

If a man beget an hundred children, and live many years, so that the days of his years be many, and his soul be not filled with good, and also that he have no burial; I say, that an untimely birth is better than he.

Yea, though he live a thousand years twice told, yet hath he seen no good: do not all go to one place?

For who knows what is good for a man during his lifetime, during the few years of his futile life? He will spend them like a shadow. For who can tell a man what will be after him under the sun?

So I commended enjoyment because there is nothing better for man under the sun than to eat, drink, and enjoy himself, for this will accompany him in his labor during the days of his life that God gives him under the sun.

But if a man live many years, and rejoice in them all; yet let him remember the days of darkness; for they shall be many. All that cometh is vanity.

So, remove grief and anger from your heart and put away pain from your body, because childhood and the prime of life are fleeting.

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;