Allah, the Exalted, gave the angels intellect without desires, He gave the animals desires without intellect, and He gave both to the sons of Adam. S… - Alī ibn Abī Ṭālib

The mind of a wise man is the safest custody of secrets; cheerfulness is the key to friendship; patience and forbearance will conceal many defects.

If you ever feel any pride or vanity on account of your sway and rule over your subjects then think of the supreme sway and rule of the Lord over the Universe, the extent of His creations, the supremacy of His Might and Glory, His Power to do things which you cannot even dream of doing and His control over you which is more dominating than that which you can ever achieve over anything around you. Such thoughts will cure your mental weakness, will keep you away from vanity and rebellion (against Allah), will reduce your arrogance and haughtiness and will take you back to the sanity which you had foolishly deserted... Try carefully to realize that a ruler can create goodwill in the minds of his subjects and can make them faithful and sincere to him only when he is kind and considerate to them, when he reduces their troubles, when he does not oppress them and when he never asks for things which are beyond their power. These are the principles which you should keep in mind and act upon".

Grief is half of old age.