Theophylact of Ohrid

Moreover, to speak more precisely, the Lord forbids not hospitality, but its elaborateness and vanity, that is, distraction and anxiety. Why, He says, "Martha, you are anxious and... troubled about many things," that is, you are distracted and worried? We have need only of eating a little, not of a variety of dishes.

Commentary on Luke ↗

Clement of Alexandria

And he was capable of busying himself about many things; but the one thing, the work of life, he was powerless, and disinclined, and unable to accomplish. Such also was what the Lord said to Martha, who was occupied with many things, and distracted and troubled with serving; while she blamed her sister, because, leaving serving, she set herself at His feet, devoting her time to learning: "Thou art troubled about many things, but Mary hath chosen the good part, which shall not be taken away from her." So also He bade him leave his …

Who is the Rich Man that Shall Be Saved? ↗

Augustine of Hippo

Our Lord therefore, who was not at a loss, for He had shown He was the Lord, answered as follows, And Jesus answered and said unto her, Martha, Martha. The repetition of the name is a mark of love, or perhaps of drawing the attention, that she should listen more earnestly. When twice called, she hears, Thou art troubled about many things, that is, thou art busied about many things. …

Catena Aurea by Aquinas ↗

Ambrose of Milan

Virtue does not have a single form. In the example of Martha and Mary, there is added the busy devotion of the one and the pious attention of the other to the Word of God, which, if it agrees with faith, is preferred even to the very works, as it is written: "Mary has chosen the good portion, which shall not be taken away from her." So let us also strive to have what no one can take away from us, so that not careless but diligent hearing may be granted to us. …

Commentary on Luke ↗

Bede

And the Lord answered and said to her: Martha, Martha, you are anxious and troubled about many things, but only one thing is necessary. And blessed David, defining this one thing necessary for man, desires to continually cling to God, saying: But it is good for me to cling to God, to put my hope in the Lord God (Psalm LXXII). …

On the Gospel of Luke ↗