Quote:
Originally posted by Eduardo:
Who said it has to expand into anything?

It is expanding in the same way a balloon expands when you blow air into it.
The balloon expands into the air surrounding it. There is air inside and there is air outside, the balloon is the edge of it.

Quote:
Originally posted by dehammer:
The circle is the edge of what?

Not the line that's for sure, the circle is the line.
try looking at a circle from the center of that circle. what do you see? a line that seperates you from what is outside of it. If that circle is your home (imagine a two d world) and the circle separates you from empty space, that line is the edge.

the more man learns, the more he realises, he really does not know anything.