Those who will play with cats ...

Those who will play with cats must expect to be scratched.
Those who will play with cats must expect to be scratched.

More phrases

I've missed more than 9000 shots in my career. I've lost almost 300 games. 26 times, I've been trusted to take the game winning shot and missed. I've failed over and over and over again in my life. And that is why I succeed.
I am fond of pigs. Dogs look up to us. Cats look down on us. Pigs treat us as equals.
Government of the people, by the people, for the people, shall not perish from the Earth.
The ballot is stronger than the bullet.
In times of change, learners inherit the earth, while the learned find themselves beautifully equipped to deal with a world that no longer exists.

Quotes from the same author

Be slow of tongue and quick of eye.
I believe there's no proverb but what is true; they are all so many sentences and maxims drawn from experience, the universal mother of sciences.
Liberty, as well as honor, man ought to preserve at the hazard of his life, for without it life is insupportable
There are but few proverbial sayings that are not true, for they are all drawn from experience itself, which is the mother of all sciences.
For historians ought to be precise, truthful, and quite unprejudiced, and neither interest nor fear, hatred nor affection, should cause them to swerve from the path of truth, whose mother is history, the rival of time, the depository of great actions, the witness of what is past, the example and instruction of the present, the monitor of the future.