“Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less.” 
― Marie Curie

“The noblest pleasure is the joy of understanding.” (Leonardo da Vinci)

“Complexity is the prodigy of the world. Simplicity is the sensation of the universe. Behind complexity, there is always simplicity to be revealed. Inside simplicity, there is always complexity to be discovered” — Gang Yu

“We may, at the end of the journey of life, arrive, having enjoyed a life without having fully appreciated the journey due to lack of observation, understanding and perspective.”  – Ashley Davidoff

“An understanding of the natural world and what’s in it is a source of not only a great curiosity but great fulfillment.”  (David Attenborough)

“The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.:” – Carl Sagan

“A successful life is one that is lived through understanding and pursuing one’s own path, not chasing after the dreams of others.” – Chin-Ning Chu

“A man may imagine things that are false, but he can only understand things that are true, for if the things be false, the apprehension of them is not understanding.”  Isaac Newton

“Our understanding is correlative to our perception.” Robert Delaunay