The inflationary universe is a theory of the “bang” of the Big Bang.

Lemaître’s models have been essentially forgotten.

The great difficulty is in trying to imagine something that you have never seen, and that is different from what has been thought of.

[T]he fact that there are rules at all … is a kind of a miracle; that it is possible to find a rule, like the inverse square law of gravitation, is some sort of miracle.

In his later career, Lemaître often had to deal with the suspicions of scientists … who suspected that his primeval atom theory was inspired by religious faith ….

The principle of science, the definition almost, is the following: The test of all knowledge is experiment. Experiment is the sole judge of scientific ‘truth’.