Clint Eastwood -- Don't Rush Into Marriage

Ancient Chinese philosopher Clint Eastwood say ... only fools rush in to love, but he can't help telling them to think twice about marriage.

Clint's soon-to-be ex-wife Dina Ruiz filed for divorce last month, which explains why last night in Brentwood ... his big marriage advice was ... don't do it without putting in serious thought. But you gotta hear how Clint says it -- the wound is clearly fresh.

So dudes planning to propose ... you gotta ask yourself one question.