Your friends come and go, but your enemies accumulate. Never fight with anyone who buys ink by the barrel. The grass is brown on both sides of the fence. In education, the shortest distance between two points is a downward spiral.
Every cow is sacred to it's mother.
When you stand in the middle of the road, you get hit by traffic going in both directions. Doing things the right way isn't necessarily the right way. You can't lead from behind.