You and I were long friends: ...

You and I were long friends: you are now my enemy, and I am yours.
You and I were long friends: you are now my enemy, and I am yours.

Quotes from the same author

One today is worth two tomorrows.
The doorstep to the temple of wisdom is a knowledge of our own ignorance.
Watch the little things; a small leak will sink a great ship.
Honesty is the best policy.
Dost thou love life? Then do not squander time, for that is the stuff life is made of.