There exists in nature a force which is immeasurably more powerful than steam, and by means of which a single man, who knows how to adapt and direct it, might upset and alter the face of the world.

Up to one's last breath, one may retain the simple joys of childhood, the poetic ecstasies of the young person, the enthusiasms of maturity. Right to the end, one may intoxicate one's spirit with flowers, with beauty and with smiles.

Everything is possible to him who wills only what is true! Rest in Nature, study, know, then dare; dare to will, dare to act and be silent!

The Placer is an enemy who must necessarily become our lord or our slave; one doesn't enjoy if it's not defeated.

Nothing can resist the will of man when he knows what is true and wills what is good.

It is necessary to DARE what must be attempted.

Doubt is really a groping ignorance.