He makes no friends who never made a foe.

No man ever got very high by pulling other people down. The intelligent merchant does not knock his competitors. The sensible worker does not work those who who work with him. Don't knock your friends. Don't knock your enemies. Don't knock yourself.

If I had a flower for every time I thought of you...I could walk through my garden forever.

a good friendship is beneficial to both, a bought friend is a free enemy that no one can afford.

Friends never turn as enemies. If they did, they were never your friends at all.

Enemies Teach. Friends Preach.