Ecclesiastes 7:3

7:3 Sorrow is better than laughter,

because sober reflection is good for the heart.

Ecclesiastes 7:7

Human Wisdom Overturned by Adversity

7:7 Surely oppression can turn a wise person into a fool;

likewise, a bribe corrupts the heart.

Ecclesiastes 7:22

7:22 For you know in your own heart

that you also have cursed others many times.