No matter how much you feed a wolf, he will always return to the forest.
More Russian Proverbs:
Sorrow doesn't kill, but it blights.Russian
Only chained bears dance.
Russian
In a rickety stable the cow produces no milk.
Russian
A golden handshake convinces even the most skeptical judge.
Russian
If one hand were the other they would both want to be clean.
Russian
For him who does not believe in signs, there is no way to live in the world.
Russian