Tasks in hours of insight willed,
In hours of gloom must be fulfilled. [ Matthew Arnold ]

There is nothing so terrible as activity without insight. [ Johann Wolfgang von Goethe ]

Deep insight will always, like Nature, ultimate its thought in a thing. [ Ralph Waldo Emerson ]

Sudden tumultuous popularity comes more from partial delirium on both sides than from clear insight, and is of evil omen to all concerned with it. [ Carlyle ]

The strong man is the wise man; the man with the gift of method, of faithfulness, of valour; who has insight into what is what, into what will follow out of what, the eye to see and the hand to do. [ Carlyle ]

The eye observes only what the mind, the heart, and the imagination are gifted to see: and sight must be reinforced by insight before souls can be discerned as well as manners, ideas as well as objects, realities and relations as well as appearances and accidental connections. [ Whipple ]