Dimensions and when the world began?

The fourth dimension is called time, which, for your sake I hope you are very much aware of. The other six have no straight forward or easy explanation to them at all. The human brain has no ability to see or recognise them let alone make sense of and understand them. I would think they are pretty much theoretical and very difficult to verify or prove. However I would say that non-existance of proof is not the same as proof of non-existance.