Worrying about my legacy when I am gone is no reason for despair

Ecclesiastes 2:20-21

Therefore I began to cause my heart to despair concerning all the labor in which I had labored under the sun. For there is a man whose labor is with wisdom, with knowledge, and with skillfulness; yet he shall leave it for his portion to a man who has not labored for it. This also is vanity and a great evil.