If we could travel into the past, it's mind-boggling what would be possible. For one thing, history would become an experimental science, which it certainly isn't today. The possible insights into our own past and nature and origins would be dazzling. For another, we would be facing the deep paradoxes of interfering with the scheme of causality that has led to our own time and ourselves. I have no idea whether it's possible, but it's certainly worth exploring.
Discussion and argument are essential parts of science; the greatest talent is the ability to strip a theory until the simple basic idea emerges with clarity.
For we have never actually understood the revolutionary sense beneath them – the incredible truth that what religion calls the vision of God is found in giving up any belief in the idea of God.
Reconnaissance memoranda should always be written in the simplest style and be purely descriptive. They should never stray from their objective by introducing extraneous ideas.
When forced to work within a strict framework, the imagination is taxed to its utmost and will produce its richest ideas. Given total freedom, the work is likely to sprawl.
Ere many generations pass, our machinery will be driven by a power obtainable at any point of the universe. This idea is not novel... We find it in the delightful myth of Antaeus, who derives power from the earth; we find it among the subtle speculations of one of your splendid... Throughout space there is energy. Is this energy static or kinetic! If static our hopes are in vain; if kinetic - and this we know it is, for certain - then it is a mere question of time when men will succeed in attaching their machinery to the very wheelwork of nature.