At present, man applies to nature but half his force. He works on the world with his understanding alone. He lives in it, and masters it by a penny-wisdom; and he that works most in it, is but a half-man, and whilst his arms are strong and his digestion good, his mind is imbruted, and he is a selfish savage.

The kingdom of man over nature, which cometh not with observation,--a dominion such as now is beyond his dream of God,--he shall enter without more wonder than the blind man feels who is gradually restored to perfect sight.

Imagination is a very high sort of seeing, which does not come by study, but by the intellect being where and what it sees, by sharing the path, or circuits of things through forms, and so making them translucid to others.

Who leaves the pine-tree, leaves his friend, Unnerves his strength, invites his end.

The law of nature is alternation for evermore. Each electrical state superinduces the opposite.

If a man fasten his attention on a single aspect of truth and apply himself to that alone for a long time, the truth becomes distorted and not itself but falsehood.

Not the sun or summer alone, but every hour and season yields its tribute of delight.