As is well known, there are any number of methods, ways, and means, and even traditional techniques for achieving spiritual rapture, and these can produce genuine feelings of transcendental oneness with God and the universe.
To what extent is such an experience lasting and existentially valid?
And to what degree can it be viewed as no more than a wonderful sensation, a passing delight that allows for all sorts of interpretation.
In contrast, we are taking the liberty of presenting Torah study as a more reliable approach to Divine union, in spite of the wrong turns this may take–that is, in spite how easily it can become a misappropriation of holiness.
Of course, there is a strong correlation between all sorts of genuine religious experience, and one cannot neatly separate them.
But there are relatively independent circuits that are considered preferable.
One of the most significant of these, we maintain, is total and pure engagement with Torah.
–Rabbi Adin Steinsaltz
From "The Way of the Soul and Torah" in The Candle of God by Rabbi Adin Steinsaltz