Related quotes

Book III, Chapter 6, "Christian Marriage"
Mere Christianity (1952)
Context: Being in love is a good thing, but it is not the best thing. There are many things below it, but there are also things above it. You cannot make it the basis of a whole life. It is a noble feeling, but it is still a feeling... Knowledge can last, principles can last, habits can last; but feelings come and go... But, of course, ceasing to be "in love" need not mean ceasing to love. Love in this second sense—love as distinct from "being in love"—is not merely a feeling. It is a deep unity, maintained by the will and deliberately strengthened by habit; reinforced by (in Christian marriages) the grace which both partners ask, and receive, from God... "Being in love" first moved them to promise fidelity: this quieter love enables them to keep the promise. It is on this love that the engine of marriage is run: being in love was the explosion that started it.
“The joys of love… last only a moment. The sorrows of love last all the life long.”
Source: The Joys of Love
"Eckhart, Brethren of the Free Spirit," from Communalism: From Its Origins to the Twentieth Century (1974), ch. 4
Context: The influence of Meister Eckhart is stronger today than it has been in hundreds of years. Eckhart met the problems of contingency and omnipotence, creator-and-creature-from-nothing by making God the only reality and the presence or imprint of God upon nothing, the source of reality in the creature. Reality in other words was a hierarchically structured participation of the creature in the creator. From the point of view of the creature this process could be reversed. If creatureliness is real, God becomes the Divine Nothing. God is not, as in scholasticism, the final subject of all predicates. He is being as unpredicable. The existence of the creature, in so far as it exists, is the existence of God, and the creature’s experience of God is therefore in the final analysis equally unpredicable. Neither can even be described; both can only be indicated. We can only point at reality, our own or God’s. The soul comes to the realization of God by knowledge, not as in the older Christian mysticism by love. Love is the garment of knowledge. The soul first trains itself by systematic unknowing until at last it confronts the only reality, the only knowledge, God manifest in itself. The soul can say nothing about this experience in the sense of defining it. It can only reveal it to others.

“Love can exist without respect, but you can't expect it to last longer.”
“We can only learn to love by loving.”
The Bell (1958), ch. 19; 2001, p. 219.