And I applied my heart to seek and to search out by wisdom concerning all that is done under heaven: it is a sore travail that God hath given to the sons of men to be exercised therewith.

I made me pools of water, to water therewith the wood that bringeth forth trees:

I have seen the travail which God hath given to the sons of men to be exercised therewith.

Whoso heweth out stones shall be hurt therewith; and he that cleaveth wood is endangered thereby.