The spread of civilisation may be likened to a fire; first, a feeble spark, next a flickering flame, then a mighty blaze, ever increasing in speed and power.

You may live to see man-made horrors beyond your comprehension.

The day science begins to study non-physical phenomena, it will make more progress in one decade than in all the previous centuries of its existence.

The progressive development of man [has as its] ultimate purpose the complete mastery of mind over the material world.

My ear barely caught signals coming in regular succession which could not have been produced on earth.

Perhaps it is better in this present world of ours that a revolutionary idea or invention instead of being helped and patted, be hampered and ill-treated in its adolescence - by want of means, by selfish interest, pedantry, stupidity and ignorance; that it be attacked and stifled; that it pass through bitter trials and tribulations, through the heartless strife of commercial existence. So do we get our light. So all that was great in the past was ridiculed, condemned, combated, suppressed - only to emerge all the more powerfully, all the more triumphantly from the struggle.

In a crystal we have clear evidence of the existence of a formative life principle, and though we cannot understand the life of a crystal, it is nonetheless a living being