If 4 dim. is not time which is debatable, then... with our current technology we will never examin a four dim. figure because 4 dim. (if not time) states that we could see everything at once... For example...
1. If we could enter the 4'th dim... when you look at a person, you not only see there current side that you would see in a 3Dim world. But you would see every side at once.
Incomprehendable with our current state of mind, untill we have made tchnological advancments creating some digital interface that could be interlinked to our minds, creating a "fake" 4 dim. world.
(Living then, would only be an image)
CONCLUSION: If not time, we might never see our 4'th dim.