“Love is not simply the sum of sweet greetings and wrenching partings and kisses and embraces, but is made up more of the memory of what has happened and the imagining of what is to come.”

Beim Wort genommen (1955); as translated by Harry Zohn

Source: Hogfather

"Adverbs" in Laughing Space : Funny Science Fiction (1982) edited by Isaac Asimov & ‎J. O. Jeppson , p. 503.

"A Kiss".
Hesperides (1648)

"Wilt thou unkind thus reave me of my heart", line 25, The First Book of Songs (1597).

This line, in the more grammatical form, "Sum up at night what thou hast done by day", is from George Herbert's The Temple, The Church Porch, line 451.
Misattributed

Source: Jinx

Source: Principles of Gestalt Psychology, 1935, p. 176
Context: Even these humble objects reveal that our reality is not a mere collocation of elemental facts, but consists of units in which no part exists by itself, where each part points beyond itself and implies a larger whole. Facts and significance cease to be two concepts belonging to different realms, since a fact is always a fact in an intrinsically coherent whole. We could solve no problem of organization by solving it for each point separately, one after the other; the solution had to come for the whole. Thus we see how the problem of significance is closely bound up with the problem of the relation between the whole and its parts. It has been said: The whole is more than the sum of its parts. It is more correct to say that the whole is something else than the sum of its parts, because summing is a meaningless procedure, whereas the whole-part relationship is meaningful.

Mukesh Ambani on retail and SEZ plans