Do not lengthen the quarrel while there is an opportunity of escaping. (Latin Proverb)
An opportunity is found with difficulty and easily lost. (Latin Proverb)
He who waits till an opportunity occurs may wait for ever. (Latin Proverb)
While we discuss matters, the opportunity passes by. (Latin Proverb)
Opportunity never knocks twice at any man's door. (Latin Proverb)
Opportunity has hair in front, behind she is bald; if you seize her by the forelock, you may hold her, but, if suffered to escape, not Jupiter himself can catch her again. (Latin Proverb)