Four philosophies: אחדות שיתוף עבודה זרה וכפירה.
אחדות There is no power other than Him, no one but He has any power, and on the higher level, nothing but Him actually exists.
שיתוף There is One G-d who is in charge but there are other forces with independent power and free will; who LISTEN TO HIM.
עבודה זרה There is One G-d who created everything, but He is (as far the lower worlds are concerned) out of control. עזב ה’ את הארץ.
כפירה may believe in spirituality also but it denies a unifying higher force altogether.
This explains what our Ma’amar says about עבודה זרה it doesn’t mean there is no One G-d it means He is not (entirely) in control. MP3