Opportunity seldom knocks twice.
More Traditional Proverbs:
If you are all wrapped up in yourself, you make a very small package.Traditional
No man can serve two masters.
Traditional
True words are not fine, Fine words are not true.
Traditional
The cream of the crop.
Traditional
He whose time has arrived, lives not.
Traditional
There is an uphill for every downhill, and a downhill for every uphill.
Traditional