Ecclesiastes 2:19-21

New Revised Standard Version, Anglicised Catholic Edition

¹⁹ —and who knows whether they will be wise or foolish? Yet they will be master of all for which I toiled and used my wisdom under the sun. This also is vanity. ²⁰ So I turned and gave my heart up to despair concerning all the toil of my labours under the sun, ²¹ because sometimes one who has toiled with wisdom and knowledge and skill must leave all to be enjoyed by another who did not toil for it. This also is vanity and a great evil.