How would you keep total power, if you had it, from corrupting you?

Here is the debate, if one discovered when they woke they had omnipotent power, what ever they thought or willed would happen; someone cuts you off and you wish them to have 4 simultaneous flats and it happens. You want money the ATM spits out what you wished. Someone says a rude comment about you and you will the large oak tree outside their home to fall on it and crush it and it does. If there was nothing that would cause you consequences what would cause you not to become an insufferable monster? Sure people say it won’t change then, and it might for a while but eventually wouldn’t power like that corrupt? What is it that will keep you from abusing it simply because you know no one can stop or oppose you?