To handle yourself, use your ...

To handle yourself, use your head; to handle others, use your heart.
To handle yourself, use your head; to handle others, use your heart.

More phrases

A leader is best when people barely know he exists, when his work is done, his aim fulfilled, they will say: we did it ourselves.
To be prepared for war is one of the most effective means of preserving peace.
He who is prudent and lies in wait for an enemy who is not, will be victorious.
From warriors ravens grew red And with their leader a host attacked.
 Taliesin
If I am walking with two other men, each of them will serve as my teacher. I will pick out the good points of the one and imitate them, and the bad points of the other and correct them in myself.

Quotes from the same author

One's philosophy is not best expressed in words; it is expressed in the choices one makes... and the choices we make are ultimately our responsibility.
Remember always that you not only have the right to be an individual, you have an obligation to be one.
Friendship with oneself is all important because without it one cannot be friends with anybody else in the world.
With the new day comes new strength and new thoughts.
No one can make you feel inferior without your consent.