By respecting the trees, you prove that you are a person who deserves to be respected!

Much sooner than we think, comes the end! Science is the only master who can change this.

On the Earth, you admire the Moon; on the Moon, you admire the Earth!

Universe is blind; it cannot see us; we must find a way to show ourselves to it and science is the way to open the eyes of the universe!

When you come across with the ideas that you don't like and even hate, do these three things: Be tolerant, be tolerant and be tolerant! Let them speak! Let the stupid and even the fools speak! Protecting freedom of expression under every circumstance is an honour for a man!

I don't like religion; I don't like anything or anybody which tells me what to do! We must take orders only from our own intelligence!

Make no cry in failure! Make no noise in success! In failure, silence; in success, silence! Fly with the same attitude both in the high and in the low altitudes!