Playing with fire will eventually turn bitter.
More Welsh Proverbs:
The best shortage is a shortage of words.Welsh
The foolish has a wagging tongue.
Welsh
Repay evil with good, and hell will not claim you.
Welsh
One needs a long spoon to sup with the devil.
Welsh
Let not your tongue cut your throat.
Welsh
Loving a woman who scorns you is like licking honey from a thorn.
Welsh