For in much wisdom is much grief; and he that increaseth knowledge increaseth sorrow.

The sleep of a laboring man is sweet, whether he eat little or much; but the fulness of the rich will not suffer him to sleep.

For he shall not much remember the days of his life; because God answereth him in the joy of his heart.

then I beheld all the work of God, that man cannot find out the work that is done under the sun: because however much a man labor to seek it out, yet he shall not find it; yea moreover, though a wise man think to know it, yet shall he not be able to find it.

Wisdom is better than weapons of war; but one sinner destroyeth much good.

And furthermore, my son, be admonished: of making many books there is no end; and much study is a weariness of the flesh.