The hypothesis may be put forward, to be tested by the s subsequent investigation, that this development has been in large part a matter of the reciprocal interaction of new factual insights and knowledge on the one hand with changes in the theoretical system on the other.

The implications of these considerations justify the statement that all empirically verifiable knowledge even the commonsense knowledge of everyday life - involves implicitly, if not explicitly, systematic theory in this sense.

The past is a source of knowledge, and the future is a source of hope. Love of the past implies faith in the future.

In a world in which the total of human knowledge is doubling about every ten years, our security can rest only on our ability to learn.

On the basis of biological, sociological, and historical knowledge, we should recognize that the individual self is subject to death or decay, but the sum total of individual achievement, for better or worse, lives on in the immortality of The Larger.