Look to the original teachings of the Divine Physicians, spiritual teachers like Moses, Buddha, Jesus, Mohammed and Baha'u'llah for spiritual laws or principles. First ascertain if source of truth is reliable, like you might a good doctor. Only as we obey them are we free and can prosper. We know and experience directly the physical consequences, but not spiritual. Thy spirit is my place of revelation, cleanse it for my manifestation.
Daily effort is required.
It is hard work, but only by overcoming can you achieve spiritual development and happiness. Fasting - found in all scriptures and holy disciplines. Way of purifying soul and ridding of attachments. Spiritual recuperation - readjust, refresh, reinvigorate soul. Symbol of abstinence of selfish and carnal desires.