Those whose acquaintance with scientific research is derived chiefly from its practical results easily develop a completely false notion of the mentality of the men who, surrounded by a skeptical world, have shown the way to kindred spirits scattered wide through the world and through the centuries. Only one who has devoted his life to similar ends can have a vivid realization of what has inspired these men and given them the strength to remain true to their purpose in spite of countless failures. It is cosmic religious feeling that gives a man such strength. A contemporary has said, not unjustly, that in this materialistic age of ours the serious scientific workers are the only profoundly religious people.

The basis of all scientific work is the conviction that the world is an ordered and comprehensive entity, which is a religious sentiment. My religious feeling is a humble amazement at the order revealed in the small patch of reality to which our feeble intelligence is equal.

A conviction akin to religious feeling of the rationality or intelligibility of the world lies behind all scientific work of a high order.

I maintain that the cosmic religious feeling is the strongest and noblest motive for scientific research.

Science prospers exactly in proportion as it is religious. The great deeds of philosophers have been less the fruit of their intellect than of the direction of that intellect by an eminently religious tone of mind. Truth has yielded herself rather to their patience, their love, their single-heartedness and their self-denial, than to their logical acumen.

But science can only be created by those who are thoroughly imbued with the aspiration toward truth and understanding. This source of feeling, however, springs from the sphere of religion. To this there also belongs the faith in the possibility that the regulations valid for the world of existence are rational, that is, comprehensible to reason. I cannot conceive of a genuine scientist without that profound faith. The situation may be expressed by an image: science without religion is lame, religion without science is blind.

Every one who is seriously involved in the pursuit of science becomes convinced that a spirit is manifest in the laws of the Universe-a spirit vastly superior to that of man, and one in the face of which we with our modest powers must feel humble.

There can never be any real opposition between religion and science; for the one is the complement of the other. Every serious and reflective person realizes, I think, that the religious element in his nature must be recognized and cultivated, if all the powers of the human soul are to act together in perfect balance and harmony. And indeed it was not by any accident that the greatest thinkers of all ages were also deeply religious souls, even though they made no public show of their religious feeling. It is from the cooperation of the understanding with the will that the finest fruit of philosophy has arisen, namely, the ethical fruit. Science enhances the moral values of life, because it furthers a love of truth and reverence — love of truth displaying itself in the constant endeavor to arrive at a more exact knowledge of the world of mind and matter around us, and reverence, because every advance in knowledge brings us face to face with the mystery of our own being.

...there is no deeper religious feeling than the feeling for the natural world. I wouldn't separate the world of nature from the religious instinct...I would not even object to saying that the sense of awe before the grandeur of nature is itself a religious experience.

The finest emotion of which we are capable is the mystic emotion. Herein lies the germ of all art and all true science. Anyone to whom this feeling is alien, who is no longer capable of wonderment and lives in a state of fear is a dead man. To know that what is impenetrable for us really exists and manifests itself as the highest wisdom and the most radiant beauty, whose gross forms alone are intelligible to our poor faculties – this knowledge, this feeling … that is the core of the true religious sentiment. In this sense, and in this sense alone, I rank myself among profoundly religious men.

Scientific research is based on the idea that everything that takes place is determined by laws of nature, and therefore this holds for the action of people. For this reason, a research scientist will hardly be inclined to believe that events could be influenced by a prayer, i.e. by a wish addressed to a Supernatural Being.

- Albert Einstein, 1936, responding to a child who wrote and asked if scientists pray; quoted in: Albert Einstein: The Human Side, edited by Helen Dukas & Banesh Hoffmann

It seems that scientific research reaches deeper and deeper. But it also seems that more and more people, at least scientists, are beginning to realize that the spiritual factor is important. I say 'spiritual' without meaning any particular religion or faith, just simple warmhearted compassion, human affection, and gentleness. It is as if such warmhearted people are a bit more humble, a little bit more content. I consider spiritual values primary, and religion secondary. As I see it, the various religions strengthen these basic human qualities. As a practitioner of Buddhism, my practice of compassion and my practice of Buddhism are actually one and the same. But the practice of compassion does not require religious devotion or religious faith; it can be independent from the practice of religion. Therefore, the ultimate source of happiness for human society very much depends on the human spirit, on spiritual values. If we do not combine science and these basic human values, then scientific knowledge may sometimes create troubles, even disaster....

How can cosmic religious feeling be communicated from one person to another, if it can give rise to no definite notion of a God and no theology? In my view, it is the most important function of art and science to awaken this feeling and keep it alive in those who are receptive to it.

I cannot conceive of a great scientist without this profound faith: Science without religion is lame, religion without science is blind.