For in much wisdom is much grief; and he who increases knowledge increases sorrow.
And to man He said, Behold, the fear of the Lord, that is wisdom! And to depart from evil is understanding!
Do not be righteous overmuch, neither make yourself overwise; why destroy yourself?
For all his days are sorrows, and his labor sadness; yea, his heart does not take rest in the night. This is also vanity.
Then I said in my heart, As it happens to the fool, so it happens even to me; and why was I then more wise? And I said in my heart that this also is vanity.