Abstract: If you define the existent as what exists is what "has an effect", then the potentially existent also exists. The in the present - at different points in space – currently existents have no effect on each other because any effect known to us spreads by an infinite velocity, i. e. time is needed until an effect gets from one point of space to another. ... Mathematics deals with potential and actual existent as well. The set of natural numbers is potentially infinite. Cantor's notion of an infinite number turned the existence of an infinite number to an actual existent. This infinite number is not constructed from an existing number, but he said that it is beyond all existing natural numbers, it is transfinite. ...

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