The best weapon against an enemy is another enemy.

Friedrich Nietzsche
Profession: Philosopher
Nationality: German

Some suggestions for you :
What do I care about the purring of one who cannot love, like the cat?
Before the effect one believes in different causes than one does after the effect.
One repays a teacher badly if one always remains nothing but a pupil.
And if you are not a bird, then beware of coming to rest above an abyss.
Sing me a new song; the world is transfigured; all the Heavens are rejoicing.