“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.”

“One of the most tragicomic things in life is that when a man makes an imaginary thing – such as a religion – as his own flag and carries it all his life and even dies for it! An intelligent man has only one flag: Flag of reason and science!”

“When the number of children goes over one, God becomes miserly in granting intelligence; he takes it from the living child and gives it to the child to be born.”

“London has now become almost like a gigantic frog! With its long tongue it draws curious insects from all over the world inside itself!”

“Science says that there are many more universes apart from ours. In that case, even when we think universally, we still think locally!”

“The more you stand aloof from the sword, from the arrow, from the lance and from the fist, the more you become civilised!”

“From whichever direction or from whoever the light comes to you, always welcome it!”