John Chrysostom

Again he has put that, "in the Lord," at once laying down the laws of obedience, and shaming them, and casting them down. For this, saith he, is well-pleasing to the Lord. See how he would have us do all not from nature only, but, prior to this, from what is pleasing to God, that we may also have reward.

Homily on Colossians 10 ↗

Theophylact of Ohrid

Again he says: "to the Lord" (Κυρίω). The Apostle desires that we do this not by nature alone, but also because it is pleasing to God, so that we may receive a reward as those who act for God's sake. Addressing children of pious parents, he said: "in all things," since impious fathers should not be obeyed in all things; one should not listen to them when they begin to forcefully draw others into their impiety.

Commentary on Colossians ↗

Thomas Aquinas

Then he deals with the second relationship, and says, children, obey your parents in everything, that is, everything that is not contrary to God: "We have had earthly fathers to discipline us and we respected them" (Heb 12:9). But if they command anything which is contrary to God, then we must remember what is said in Luke: "If any one comes to me and does not hate his own father and mother and wife and children and brothers and sisters, yes, and even his own life, he cannot be my disciple" (14:26). …

Commentary on Colossians ↗