(29) When the LORD your God has cut down before you the nations that you are about to enter and dispossess, and you have dispossessed them and settled in their land, (30) beware of being lured into their ways after they have been wiped out before you! Do not inquire about their gods, saying, “How did those nations worship their gods? I too will follow those practices.” (31) You shall not act thus toward the LORD your God, for they perform for their gods every abhorrent act that the LORD detests; they even offer up their sons and daughters in fire to their gods. (1) Be careful to observe only that which I enjoin upon you: neither add to it nor take away from it.
(2) in that same manner will I act in worshiping God , thinking that you thereby do well. However, you must not act thus, because all of their actions are abhorrent to God (as evidenced by the subsequent explanation, they even set fire to their sons… ). Rather, you must observe that which I have commanded you.
Abraham ben Meir Ibn Ezra (אַבְרָהָם אִבְּן עֶזְרָא or ראב"ע) 1089–c.1167 Spain, was one of the most distinguished Jewish Biblical commentators and philosophers of the Middle Ages.
https://en.m.wikipedia.org/wiki/Abraham_ibn_Ezra
(1) לא תוסף עליו, for you might add something which is despicable in the eyes of the Lord. If, perchance, you would add new ways of the serving the Lord, you have no assurance that such innovation is acceptable to G’d, for instance the burning of one’s children in G’d’s honour.
Ovadia ben Jacob Sforno (Obadja Sforno, עובדיה ספורנו) c.1475-1550 Italy, was an Italian rabbi, Biblical commentator, philosopher and physician.
https://en.m.wikipedia.org/wiki/Obadiah_ben_Jacob_Sforno
(13) If you hear it said, of one of the towns that the LORD your God is giving you to dwell in, (14) that some scoundrels from among you have gone and subverted the inhabitants of their town, saying, “Come let us worship other gods”—whom you have not experienced— (15) you shall investigate and inquire and interrogate thoroughly. If it is true, the fact is established—that abhorrent thing was perpetrated in your midst— (16) put the inhabitants of that town to the sword and put its cattle to the sword. Doom it and all that is in it to destruction:
Spiritual experiences can be positive or negative
How can spiritual experienced benefit us? How can they harm us?
Can we innovate to create meaningful spiritual experiences without violating this passage?
If we can, how do we keep our innovation true to Torah/Judaism?


