"Many do with opportunities as children do at the seashore. They fill their little hands with sand and then let the grains fall through, one by one until all are gone." 
T. Jones.

"Opportunity dances with those who are already on the dance floor." 
Jackson Brown

"Too many people are thinking of security instead of opportunity. They seem more afraid of life than death. James." 
F. Byrnes

"The optimist sees opportunity in every danger; the pessimist sees danger in every opportunity."
Winston Churchill