The real essence of work is concentrated energy

No great work has ever been produced except after a long interval of still and musing meditation.

No great work has ever been produced except after a long interval of still and musing meditation

Life is not a set campaign, but an irregular work, and the main forces in it are not overt resolutions, but latent and half-involuntary promptings

The energy of the mind is the essence of life.

Don't worry about life, you're not going to survive it anyway.