Do you see? There exists a kind of knowledge that is without love. It does not purify the psyche in any way, but kills it, as it lacks the love that is the head, the body, and very root of all virtue. Gregory Palamas
Time is a great teacher, but unfortunately it kills all its pupils. Hector Berlioz
They say that death kills you, But death doesn't kill you. Boredom and indifference kill you. Iggy Pop
The fowl digs out the blade that kills it. Somali Proverb
He who spies is the one who kills. Irish Proverb
A nobleman's calf does not know how a butcher kills. Korean Proverb