I wonder if God has had enough of our public prayers? This scripture seems to run counter to popular culture. I run into folks who ask for prayer and seem content to let someone else pray for them. I don’t think that is what this verse is talking about. I think what God is addressing in this text is the kind of prayers said by people who want to be known to their prayers, or their holiness, or some other pretentious piety. I can imagine God is really sick of that kind of praying. To keep us from that temptation He sends us to the closet to keep us out of the spotlight and in the Spirit. God has so much more reserved for those that are earnest in prayer.
This is not a verse to say to keep our faith private. A recent change in language is a freedom of religion to a freedom of worship. The intent is to put our worship behind closed doors, to make our practice of faith private, and many Christians are content to do so. That is a misapplication if this verse. Faith is to be practiced and public. Christians should never have to apologize for being Christians. In fact, we should expect persecution for practicing our faith in the public sphere. And so it goes.
God bless you today!