Vanity of vanities, says Qoheleth, vanity of vanities! All things are vanity!

Here is one who has labored with wisdom and knowledge and skill, and yet to another who has not labored over it, he must leave property.

This also is vanity and a great misfortune.

For what profit comes to man from all the toil and anxiety of heart with which he has labored under the sun?

All his days sorrow and grief are his occupation; even at night his mind is not at rest.

This also is vanity.