friendship, best measures, worth
Success always necessitates a degree of ruthlessness. Given the choice of friendship or success, I'd probably choose success.
FRIENDSHIP, SUCCESS ALWAYS NECESSITATES A DEGREE OF RUTHLESSNESS
Instead of loving your enemies - treat your friends a little better.
loving your enemies, treat, friends, friendship, little better
Never explain - your friends do not need it and your enemies will not believe you anyway.
friends, explain, believe, enemies