Ignorance is not bliss; ignorance is impotence; it is fear; it is cruelty; it is all the things that make for unhappiness

Cruelty is a tyrant that's always attended with fear

Your lack of fear is based on your ignorance.

لا شئ يقتل الفكر مثل الخوف (ولا شئ يقوي الخوف مثل الجهل)

All tyranny, bigotry, aggression, and cruelty are wrong, and whenever we see it, we must never be silent.

Fear is the main source of superstition, and one of the main sources of cruelty. To conquer fear is the beginning of wisdom, in the pursuit of truth as in the endeavour after a worthy manner of life.