As long as his strength ...

As long as his strength permits, the poor mortal must always climb new mountains.
 Fausto Cercignani

Quotes from the same author

Inner freedom demands the rejection of any imposition that injures our dignity.
 Fausto Cercignani
Secret thoughts are only half free: they fly undisturbed in the skies of the inner freedom, but they can never leave them.
 Fausto Cercignani