Parents are like superiors, and so a parent's love tends to conferring benefits, while the children's love tends to honor their parents.
 Thomas Aquinas, Summa Theologica (1274). copy citation

add
Author Thomas Aquinas
Source Summa Theologica
Topic honor love
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

“wherefore in paying back benefits received, we should give the first place to our parents before all others, unless, on the other side, there be such weightier motives, as need or some other circumstance, for instance the common good of the Church or state. In other cases we must take to account the connection and the benefit received; and here again no general rule can laid down. Reply Obj. 4: Parents are like superiors, and so a parent's love tends to conferring benefits, while the children's love tends to honor their parents. Nevertheless in a case of extreme urgency it would be lawful to abandon one's children rather than one's parents, to abandon whom it is by no means lawful, on account of the obligation we lie under towards them for the benefits we have received from them, as the Philosopher states” source