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. – Matthew 6:24
The idols of the heathen are all made to stand in the Pantheon face to face, and there is no quarrelling among them; but as soon as you introduce Christ there, they must all go down, or He will not stay. The principle of the toleration of every form of doctrine-I mean not, of course, civil toleration, which we hold to be always necessary and right, but I mean mental toleration,-the principle of the mental toleration of all forms of doctrine, and all forms and shades of action, is heathenish, for where Christ comes He comes to reign; and when once He enters the soul of a man, it is down, down, down with everything else.
There is a text which is often misunderstood. “No man can serve two masters.” I very much question whether he cannot; I believe he could serve, not only two, but twenty. That is not the meaning of the text; the true reading of it is, “No man can serve two masters.” They cannot both be masters; if two of them are equal, then neither of them is really master. It is not possible for the soul to be subject to two master-passions. If a man says, “I love Christ,” that is well; but if he says, “I love Christ, and I love money, and I love them both supremely,” that man is a liar, for the thing is not possible. There is only one that can be the master-passion; and where Jesus enters the soul, love to Him must be the master-passion of the heart. ~ C.H. Spurgeon
https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2469.cfm