A Boy put his hand into a jar of Filberts, and grasped as many as his fist could possibly hold. But when he tried to pull it out again, he found he couldn’t do so, for the neck of the jar was too small to allow of the passage of so large a handful. Unwilling to lose his nuts but unable to withdraw his hand, he burst into tears.

A bystander, who saw where the trouble lay, said to him, “Come, my boy, don’t be so greedy: be content with half the amount, and you’ll be able to get your hand out without difficulty.” 

Do not attempt too much at once.