"True love is not a feeling by which we are overwhelmed," said Scott Peck. "It is a committed, thoughtful decision... This person has made a commitment to be loving whether or not the loving feeling is present."
In The Art of Loving, Erich Fromm starts with the same premise, and extrapolates what this means for marriage:
"This being so, it should not make any difference whom we love. Love should be essentially an act of will, of decision to commit my life completely to that of one other person. This is, indeed, the rationale behind the idea of the insolubility of marriage, as it is behind the many forms of traditional marriage in which the two partners never choose each other, but are chosen for each other— and yet are expected to love each other...
To love somebody is not just a strong feeling— it is a decision, it is a judgment, it is a promise. If love were only a feeling, there would be no basis for the promise to love each other forever. A feeling comes and it may go. How can I judge that it will stay forever, when my act does not involve judgment and decision?"
However, Fromm continues, it's not that simple:
"Inasmuch as we are all one, we can love everybody in the same way in the sense of brotherly love. But inasmuch as we are all also different, erotic love requires certain specific, highly individual elements which exist between some people but not between all.
Both views then, that of erotic love as completely individual attraction, unique between two specific persons, as well as the other view that erotic love is nothing but an act of will, are true— or, as it may be put more aptly, the truth is neither this nor that. Hence the idea of a relationship which can be easily dissolved if one is not successful with it is as erroneous as the idea that under no circumstances must the relationship be dissolved."