Thanks Dear Piotr, I was comparing that with the knife only to tell you about things which has two sides,

and about that idea which some people saying humans should not do any mistake and they should not fail, so let's see what these guys said about failing:

so I say, let's do it, let's grow and learn and continue to its end, either there will be not meaning in life but just eating, sleeping and living and dying. so everything worth a try. future won't come if we sit and watch.

Sincerely,
D.F