I care. I care about it all. It takes too much energy not to care.

The fundamental concept in social science is power, in the same sense in which energy is the fundamental concept in physics.

Energy is the power that drives every human being. It is not lost by exertion but maintained by it, for it is a faculty of the psyche.

It is not too much to expect that our children will enjoy in their homes electrical energy too cheap to meter.

Where it is a duty to worship the sun, it is pretty sure to be a crime to examine the laws of heat.

Oil dependency is not just an economic attachment but appears as a kind of cognitive compulsion.

The transition from tenseness, self-responsibility, and worry to equanimity, receptivity, and peace is the most wonderful of all those shiftings of inner equilibrium, those changes of personal center of energy.

At the start there’s always energy.

Will and energy sometimes prove greater than either genius or talent or temperament.

Fire is a natural symbol of life and passion, though it is the one element in which nothing can actually live.

I imagine that one of the first forms of behavior, like one of the first signals, may be reduced to this: “Keep me warm.”

The brightest light burns the quickest.

Is it a fact—or have I dreamed it—that, by means of electricity, the world of matter has become a great nerve, vibrating thousands of miles in a breathless point of time?