A fisherman who lived on the produce of his nets, one day caught a single small fish as the result of his day's labor. The fish, panting convulsively, thus entreated for his life:"O sir, what good can I be to you, and how little am I worth! I am not yet come to my full size. pray spare my life, and put me back into the sea. I shall soon become a large fish, fit for the tables of the rich; and then you can catch me again, and make a handsome profit of me." 
Do not forego a certain gain for an uncertain profit. 