Pseudo-Chrysostom
Catena Aurea · Matthäusevangelium 6
No man can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. Ye cannot serve God and mammon.
The Lord had said above, that he that has a spiritual mind is able to keep his body free from sin; and that he who has not, is not able. Of this He here gives the reason, saying, No man can serve two masters.