Ecclesiastes 4:7

Better is an handful with quietness, than both the hands full with travail and vexation of spirit.

There is one alone, and there is not a second; yea, he hath neither child nor brother: yet is there no end of all his labour; neither is his eye satisfied with riches; neither saith he, For whom do I labour, and bereave my soul of good? This is also vanity, yea, it is a sore travail.