Comment to The Ancient System of Kundalini Yoga
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A disclaimer might be in order however.
Although attractive, deep, comprehensive and even benign, this is from the tradition or lineage of Shri Shankaracharya.
Therefore, the path is considered to be impersonalist generally speaking, they are advaita vedantists.
And, because of the distinction in their definition (or acceptance) of divinity, their realization of the goal is accordingly different to those who cultivate a personal relationship till the very end. All along, it is IMO important to maintain such ability to discriminate.