Life is tough, but it's tougher if you're stupid. John Wayne
It's easy to make a buck. It's a lot tougher to make a difference. Tom Brokaw
No man worth his salt, no man of spirit and spine, no man for whom I could have any respect, could rejoice in the identification of Tallulah's husband. It's tough enough to be bogged down in a legend. It would be even tougher to marry one. Tallulah Bankhead
The tougher the fight, the sweeter the triumph. American Proverb
A problem is solved when it gets tougher. Arabic Proverb
Tougher than a stone. Arabic Proverb