A good method of discovery is to imagine certain members of a system removed and then see how what is left would behave: for example, where would we be if iron were absent from the world: this is an old example.
Georg C. LichtenbergPerhaps in time the so-called Dark Ages will be thought of as including our own.
Georg C. LichtenbergMany are less fortunate than you' may not be a roof to live under, but it will serve to retire beneath in the event of a shower.
Georg C. LichtenbergIt is in the gift for employing all the vicissitudes of life to one's own advantage and to that of one's craft that a large part of genius consists.
Georg C. LichtenbergThe great trick of regarding small departures from the truth as the truth itself - on which is founded the entire integral calculus - is also the basis of our witty speculations, where the whole thing would often collapse if we considered the departures with philosophical rigour.
Georg C. Lichtenberg