Badness you can get easily, in quantity; the road is smooth, and it lies close by, But in front of excellence the immortal gods have put sweat, and long and steep is the way to it.
He fashions evil for himself who does evil to another, and an evil plan does mischief to the planner.
A bad neighbor is as great a calamity as a good one is a great advantage.
If you add a little to a little, and then do it again, soon that little shall be much.