There is no such thing as secular music.  Every piece of music reflects something.  The musicians performing the piece of music reflected in their performance exactly how they were feeling, the reverence they had towards the music (or in some cases the irreverence).  Every emotion they were experiencing would come through in any superb piece of music.  It does not take long for a listener to realize the piece was mediocre.  Then you should discard that piece and no longer listen to that piece of music.

A good piece of music has power:  it can bring you up or even down.  And the best sometimes can do both.  You must be aware of the impact of the music you listen to and play it at appropriate times.

It is true there is no such thing as secular music.  Nevertheless, the piece can edify you or subvert you and you must be aware of what you are listening to and its power.  Subliminal messages can be conveyed.  Music can drive you up or bring you down.  You must be careful.