Death is not the greatest tragedy in life. The greatest tragedy is what dies inside us while we live. We need not fear death. We need fear only that we may exist without having sensed something of the possibilities that lie within human existence.

Cynicism is intellectual treason.

The individual is capable of both great compassion and great indifference. He has it within his means to nourish the former and outgrow the latter.

Infinity converts the possible into the inevitable.

The growth of the human mind is still high adventure, in many ways the highest adventure on earth.

The need is not to amputate the ego ... but to transcend it.

The conquest of war and the pursuit of social justice... must become our grand preoccupation and magnificent obsession.