“Youth, which is forgiven everything, forgives itself nothing : Age, which forgives itself everything, is forgive nothing.” who said that?

There are some quotes of G.B Shaw.

Liberty also means responsibility.
That is why most men dread it.

He who has never hoped can never despair.

When a stupid man is doing something he is ashamed
Of, he always declare that it is his duty.

Source: goodreads.com