Secondly, the degrees of love may be measured from the standpoint of the lover, and in this respect a man loves more that which is more closely connected with him, in which way a man's children are more lovable to him than his father, as the Philosopher states (Ethic. viii) .
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic love respect
Date 1274
Language English
Reference
Note Translated by Fathers of the English Dominican Province
Weblink http://www.gutenberg.org/cache/epub/18755/pg18755-images.html

Context

“In this respect the better a thing is, and the more like to God, the more is it to be loved: and in this way a man ought to love his father more than his children, because, to wit, he loves his father as his principle, in which respect he is a more exalted good and more like God.
Secondly, the degrees of love may be measured from the standpoint of the lover, and in this respect a man loves more that which is more closely connected with him, in which way a man's children are more lovable to him than his father, as the Philosopher states (Ethic. viii) . First, because parents love their children as being part of themselves, whereas the father is not part of his son, so that the love of a father for his children, is more like a man's love for himself.” source