harry scanned the powers , and he could see their appeal : understanding of all sounds uttered by living beings ; knowledge of past lives ; knowledge of the nature of ones mind ; making ones body invisible ; making oneself unhearable ; knowing the exact time of ones death ; extra-ordinary powers of friendliness and compassion ; the strength of an elephant ; clairvoyance ; knowledge of the arrangement of spaces and stars in this universe ; knowledge of the constitution of the body ; ability to still hunger and thirst ; absolute motionlessness ; able to view celestial beings ; walk on water ; surround himself with light ; levitation .