英语寓言故事-The Fisher and the Little Fish

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.