Spiritual masters have been declaring these truths for millennia. More recently, in the Bhagavad Gita, Krsna states (paraphrase): "That which is nectar in the

Spiritual masters have been declaring these truths for millennia. More recently, in the Bhagavad Gita, Krsna states (paraphrase): "That which is nectar in the beginning becomes poison in the end/ That which is poison in the beginning becomes nectar in the end" Your experiences seem to verify this.