I have always believed that astrophysics should be the extrapolation of laboratory physics, that we must begin from the present universe and work our way backward to progressively more remote and uncertain epochs.

Gravitational systems are the ashes of prior electrical systems.

We should remember that there was once a discipline called natural philosophy. Unfortunately, this discipline seems not to exist today. It has been renamed science, but science of today is in danger of losing much of the natural philosophy aspect.

To try to write a grand cosmical drama leads necessarily to myth. To try to let knowledge substitute ignorance in increasingly larger regions of space and time is science.

Most people today still believe, perhaps unconsciously, in the heliocentric universe. Every newspaper in the land has a section on astrology, yet few have anything at all on astronomy.

If a problem is too difficult to solve, one cannot claim that it is solved by pointing at all the efforts made to solve it.

I have no trouble publishing in Soviet astrophysical journals, but my work is unacceptable to the American astrophysical journals.