The "Susiddhikara Sūtra" is largely a compendium of rituals. Tantric Buddhism is concerned with the rituals and meditative practices that lead to enlightenment. According to Shingon doctrine, enlightenment is not a distant, foreign reality that can take aeons to approach but a real possibility within this very life, based on the spiritual potential of every living being, known generally as Buddha-nature. If cultivated, this luminous nature manifests as innate wisdom. With the help of a genuine teacher and through proper training of the body, speech, and mind, i.e. , we can reclaim and liberate this enlightened capacity for the benefit of ourselves and others.