Matthew
Matthew 6:23BSB·traditional attribution

But if your eyes are bad, your whole body will be full of darkness. If then the light within you is darkness, how great is that darkness!

John Calvin Reformed @genevareformer

23. If the light which is in thee be darkness Light signifies that small portion of reason, which continues to exist in men since the fall of Adam: and darkness signifies gross and brutal affections. The meaning is, we ought not to wonder, if men wallow so disgracefully, like beasts, in the filth of vices, for they have no reason which might restrain the blind...

Matthew Henry Presbyterian @wholebiblehenry

Worldly-mindedness is as common and as fatal a symptom of hypocrisy as any other, for by no sin can Satan have a surer and faster hold of the soul, under the cloak of a visible and passable profession of religion, than by this; and therefore Christ, having warned us against coveting the praise of men, proceeds next to warn us against coveting the wealth of...

Commenting on Matthew 6:19-24

John Gill Reformed Baptist @doctorgill

No man can serve two masters,.... Whose orders are directly contrary to one another: otherwise, if they were the same, or agreed, both might be served; but this is rarely the case, and seldom done. This is a proverbial expression, and is elsewhere used by Christ, Luk 16:13.