Wisdom cannot be directly transmitted, and does not readily accumulate through the ages.

Astronomy is something like the ministry. No one should go into it without a call. I got that unmistakable call, and I know that even if I were second-rate or third-rate, it was astronomy that mattered.

There we measure shadows, and we search among ghostly errors of measurement for landmarks that are scarcely more substantial.

Science is the one human activity that is truly progressive. The body of positive knowledge is transmitted from generation to generation.

Wisdom cannot be directly transmitted, and does not readily accumulate through the ages.

All nature is a vast symbolism: Every material fact has sheathed within it a spiritual truth.

A scientist naturally and inevitably ... mulls over the data and guesses at a solution. He proceeds to testing of the guess by new data-predicting the consequences of the guess and then dispassionately inquiring whether or not the predictions are verified.