He harms himself who does harm to another, and the evil plan is most harmful to the planner.
Neither make thy friend equal to a brother; but if thou shalt have made him so, be not the first to do him wrong.
He for himself weaves woe who weaves for others woe, and evil counsel on the counselor recoils.
Observe due measure, for right timing is in all things the most important factor.
A bad neighbor is a misfortune, as much as a good one is a great blessing.
He's only harming himself who's bent upon harming another