5 Good are ministrations done to the poor, and especially the due services and the religious offices done to the saints of God. For they are a payment, not a gift, as the Apostle says, “If we have sown unto you spiritual things, is it a great thing if we shall reap your carnal things?” Good are they, we exhort you to them, yea by the word of the Lord we build you up, “be not slow to entertain” the saints. Sometimes, they who were not aware of it, by entertaining those whom they knew not, have entertained angels. These things are good; yet better is that thing which Mary has chosen.
For the one thing has manifold trouble from necessity; the other has sweetness from charity. A man wishes when he is serving, to meet with something; and sometimes he is not able: that which is lacking is sought for, that which is at hand is got ready; and the mind is distracted. For if Martha had been sufficient for these things, she would not have demanded her sister's help. These things are manifold, are diverse, because they are carnal, because they are temporal; good though they be, they are transitory.
But what said theLord to Martha? “Mary has chosen that better part.” Not you a bad, but she a better. Hear, how better; “which shall not be taken away from her.” Some time or other, the burden of these necessary duties shall be taken from you: the sweetness of truth is everlasting. “That which she has chosen shall not be taken away from her.” It is not taken away, but yet it is increased. In this life, that is, is it increased, in the other life it will be perfected, never shall it be “taken away.”
Source: Sermons on Selected Lessons of the New Testament (New Advent)