John Calvin Commentary Joshua 24:23

"Now therefore put away, [said he], the foreign gods which are among you, and incline your heart unto Jehovah, the God of Israel." — Joshua 24:23 (ASV)

Now, therefore, put away the strange gods, etc. How can it be that those who were recently such stern avengers of superstition have themselves given admission to idols? Yet the words expressly command that they are to put away strange gods from among them. If we interpret this to mean that their own houses were still polluted by idols, we can see, as in a bright mirror, how complacently the greater part of mankind can indulge in vices which they punish with relentless severity in others.

But, as I do not think it probable that they dared, after the execution of Achan, to pollute themselves with manifest sacrilege, I am inclined to think that the reference is not to their practice but to their inclinations, and that they are told to put all ideas of false gods far away from them.

For he had previously exhorted them in this same chapter to take away the gods whom their fathers had served beyond the River and in Egypt. But no one will suppose that the idols of Chaldea were treasured in their homes, or that they had brought impure deities with them from Egypt, to be a cause of hostility between God and themselves.

The meaning, therefore, is simply that they are to renounce all idols and clear themselves of all profanity, so that they may purely worship God alone. This seems to be the meaning of the clause, incline your heart unto the Lord, which may be taken as equivalent to, rest in him, and so give up your heart to loving him, so as to delight in him and be contented only with him.