All good that you have done for the humanity, keep it like a secret; do your goodness in the shadow! Let one day others find this secret, preferably long after you have passed away!

Fame is like a castle. Castles are beautiful to dream and wonderful to watch, but too encircled to live in!

Don't talk me about religion! Don't talk me about tales for children! Be serious! Trust science, because only the science can save you!

Smiling face is always beautiful even if it is hundred years old!

History of science is a relay race, my painter friend. Copernicus took over his flag from Aristarchus, from Cicero, from Plutarch; and Galileo took that flag over from Copernicus.

Physical limitedness can only be surpassed by mental unlimitedness!

Every kindness we have done is a monument built in our name in the heart of God!