Criticism is good but it is not helpful (even a constructive one) in the beginning of an idea development.

It is not easy to grow ideas and make it a reality. There are things that you have to worry about and most people know about them. Help your creative process by concentrating on what is possible and less about what is not perfect.

Repeat, refine, retry.

But spare the criticism, even the good intentioned one.

Wait until it is time.

Otherwise, the idea will have no chance whatsoever to become a reality.

A child will never able to walk if he/she was aware of the situation and being critical about it.

A child has no shame of failure - so she developed this amazing creation and development process that stopped somehow at the age of 13, when boys discover girls and girls realize their power over boys.

Find reasons why an idea would work and execute it ruthlessly. Ideas, like talk, are cheap. Execution is the secret of everything.