“Sometimes I'm criticized in my own country for professing a belief in international norms and multilateral institutions. But I am convinced that in the long run, giving up some freedom of action – not giving up our ability to protect ourselves or pursue our core interests, but binding ourselves to international rules over the long term – enhances our security.”

Nobel Peace prize acceptance speech (1985)
Context: I am convinced that today is a great and exciting day not only for the members of our international movement but also for all physicians on our planet, irrespective of their political and religious beliefs. For the first time in history, their selfless service for the cause of maintaining life on Earth is marked by the high Nobel Prize. True to the Hippocratic Oath, we cannot keep silent knowing what final epidemic-nuclear war — can bring to humankind. The bell of Hiroshima rings in our hearts not as a funeral knell, but as an alarm bell calling out to actions to protect life on our planet.
We were among the first to demolish the nuclear illusions that existed and to unveil the true face of nuclear weapons — the weapons of genocide. We warned the peoples and governments that medicine would be helpless to offer even minimal relief to the hundreds of millions of victims of nuclear war.
However, our contacts with patients inspire our faith in the human reason. Peoples are heedful of the voice of physicians who warn them of the danger and recommend the means of prevention.

Kunnumpuram, Kurien, 2011 “Theological Exploration,” Jnanadeepa: Pune Journal of Religious Studies 14/2 (July-Dec 2011)
On God

Psychedelic Society (1984)
Context: Our ability to destroy ourselves is the mirror image of our ability to save ourselves, and what is lacking is the clear vision of what should be done... What needs to be done is that fundamental, ontological conceptions of reality need to be redone. We need a new language, and to have a new language we must have a new reality... A new reality will generate a new language, a new language will fix a new reality, and make it part of this reality.

Foreword (January 1960)
You Learn by Living (1960)
Context: One's philosophy is not best expressed in words; it is expressed in the choices one makes. In stopping to think through the meaning of what I have learned, there is much that I believe intensely, much I am unsure of. In the long run, we shape our lives and we shape ourselves. The process never ends until we die. And, the choices we make are ultimately our own responsibility.

Source: A Discourse on the Love of Our Country (1789), p. 10

Speech http://hansard.millbanksystems.com/lords/1962/nov/08/britain-and-the-common-market in the House of Lords on the British application to join the Common Market (8 November 1962).
1960s

The Ethics of Belief (1877), The Duty of Inquiry
Context: Belief, that sacred faculty which prompts the decisions of our will, and knits into harmonious working all the compacted energies of our being, is ours not for ourselves but for humanity. It is rightly used on truths which have been established by long experience and waiting toil, and which have stood in the fierce light of free and fearless questioning. Then it helps to bind men together, and to strengthen and direct their common action. It is desecrated when given to unproved and unquestioned statements, for the solace and private pleasure of the believer; to add a tinsel splendour to the plain straight road of our life and display a bright mirage beyond it; or even to drown the common sorrows of our kind by a self-deception which allows them not only to cast down, but also to degrade us. Whoso would deserve well of his fellows in this matter will guard the purity of his beliefs with a very fanaticism of jealous care, lest at any time it should rest on an unworthy object, and catch a stain which can never be wiped away.
It is not only the leader of men, statesmen, philosopher, or poet, that owes this bounden duty to mankind. Every rustic who delivers in the village alehouse his slow, infrequent sentences, may help to kill or keep alive the fatal superstitions which clog his race. Every hard-worked wife of an artisan may transmit to her children beliefs which shall knit society together, or rend it in pieces. No simplicity of mind, no obscurity of station, can escape the universal duty of questioning all that we believe.
It is true that this duty is a hard one, and the doubt which comes out of it is often a very bitter thing. It leaves us bare and powerless where we thought that we were safe and strong. To know all about anything is to know how to deal with it under all circumstances. We feel much happier and more secure when we think we know precisely what to do, no matter what happens, than when we have lost our way and do not know where to turn. And if we have supposed ourselves to know all about anything, and to be capable of doing what is fit in regard to it, we naturally do not like to find that we are really ignorant and powerless, that we have to begin again at the beginning, and try to learn what the thing is and how it is to be dealt with — if indeed anything can be learnt about it. It is the sense of power attached to a sense of knowledge that makes men desirous of believing, and afraid of doubting.

2010s, 2016, April, Foreign Policy Speech (27 April 2016)

1930s, Address at San Diego Exposition (1935)