Window washers increase the vision in the windows of the buildings; wisdom quotes do the same thing in the eyes of the people!

Applauds of the ignorant majority are worthless; applauds of the wise minority are priceless! Look carefully, who are applauding you? Look carefully, who are blessing you? Mud in the ground or stars in the sky?

My friends, I like them; my morals, I like them more!

Wars can destroy everything but hope!

Your only real problem is mortality! No religion can solve this problem, but science can do!

Man must spend much more time in extraordinary natural places to grasp much better how remarkable our planet is and to realise what a great privilege and what an enormous joy to be living here!

Regular and simple life is the life of God; the chaotic and the complex one is the Devil's!