I am convinced there is only one way to eliminate these grave evils, namely through the establishment of a socialist economy, accompanied by an educational system which would be oriented toward social goals.

What I see in Nature is a grand design that we can understand only imperfectly, one with which a responsible person must look at with humility.

Epistemology without contact with science becomes an empty scheme. Science without epistemology is-insofar as it is thinkable at all-primitive and muddled.

Out of the multitude of our sense experiences we take, mentally and arbitrarily, certain repeatedly occurring complexes of sense impression (partly in conjunction with sense impressions which are interpreted as signs for sense experiences of others), and we attribute to them a meaning the meaning of the bodily object.

At least once a day, allow yourself the freedom to think and dream for yourself.

Earth is the insane asylum of the universe.

Everything that can be counted does not necessarily count; everything that counts cannot necessarily be counted.