Anger that has no limit causes terror, and unseasonable kindness does away with respect. Be not so severe as to cause disgust, nor so lenient as to make people presume.
SaadiThe sons of Adam are limbs of each other, Having been created of one essence. When the calamity of time affects one limb, the other limbs cannot remain at rest. If you have no sympathy for the troubles of others, You are unworthy to be called by the name of a human.
Saadi