It happened that a fisher, after fishing all day, caught only a little fish. "Pray, let me go, master," Said the fish. "I am much too small for your eating just now.if you put me back into the river I shall soon grow, then you can make a fine meal off me.""Nay, nay, my little fish," Said the fisher, "I have you now. I may not catch you hereafter." 
A little thing in hand is worth more than a great thing in prospect. 