Rivalry

"He who ignores a rival, does not get to eat everything up, like the bull which ignores the bull at its side. But he who acknowledges a contest can be the outright winner, like the bull which acknowledges the bull at its side."

"Rivalry and personal vanity should have no place among you, but you should humbly reckon others better than yourselves. You must look to each other's interest and not merely to your own."