"It is not the possession of truth, but the success which attends the seeking after it, that enriches the seeker and brings happiness to him."

"The quantum of action, as I called it, was a purely formal assumption and I really did not think much about it."

"The highest value of human life lies in its service to humanity."

"The greatest error of all is to confuse the subjective with the objective."

"The greatest obstacle to discovery is not ignorance, but the illusion of knowledge."