FAILURE

Lions only make 25% of hunting successfully and never stopped hunting. 50% of the Fish eggs are eat by other fishes. 50% of baby Bear die before it grow. 50% of the rain goes in the oceans and seas. Most of the flours beans are eat by the birds.

All of this examples are contentiously keep hunting, put eggs, have baby and it keeps raining and so on... is an example of what we call it "WASTED EFFORT". All species even nature are keep trying, because it is a NATURE RULE.

Only human refuse this rule because WE consider the trying as FAILURE.

Hey Human, you should know that FAILURE is when you stop TRYING.