h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

oke, let's start on something that puzzles me at the moment. It's something that can keep me puzzled for hours but maybe you can help me with it. Ill start with an explanation (friend read bout it in the book nada brahma):

if you're twodimensional (horizontal and vertical but no depth) you know that the 3rd dimension exists but you can't influence it, example: you're a 2dimensional animal sitting next to a 3dimensional box, you know the box is there but you cannot move it because you havent got depth, so you cant pull it or push it over or something like that.

Now let's get to the point. We humans are 3dimensional (horizontal, vertical and depth). The fourth dimension is time. We know that time exists but we cannot influence it. To influence it we probably have to be 4dimensional. Now what does a 4dimensional animal look like? And can it travel in time? And what is the fifth dimension? And if we know the fifth dimension can we then work out the fourth? Or what? Or are we then gonna get the whole conversation over again in the fifth dimension?

Got ideas about this? Or am i being a bore again...