Why does skepticism make Cleaning lightness feel like placebo fading?

After the Heartfulness 'Cleaning' process, I often feel a wonderful sense of physical lightness. But I remain skeptical if this is genuine spiritual purification or just a psychological placebo. I worry that if I don't believe in the spiritual mechanism, the effect will fade. My name is Shweta, born on 22nd October 1990. Time: 9:15 PM. Location: Hyderabad. Does doubting the process diminish the relief from anxiety?