Okay i was recently thinking about 4d and sort of came across this idea. So the 4th dimension is time right? And time is relative to the speed of the object which is pulling you towards is gravitational mass ( in our case the earth's core).
What i thought was, what if the 4th dimension was supplying the lower dimensions with a magnetic force. This force has infinite length, height and width the same as the universe. It has a north and a south the same as any magnet. Because it's magnetic it only affects metallic materials and because every planet has some type of metallic material in it's 'makeup' it will be affected by the magnetic force. Our Earth's core is made up of mostly iron and nickel which are both metals and both react with magnetism. Our planet has a 24hr day but if you were to live on the moon the time would be much slower. Time is relative to the speed a planet or moon rotates on it's own axis and around the gravitational axis supplied by the mass which is nearest (for the moon it's the Earth, for the Earth it's the sun). If a magnetic force was controlling the speed of rotation and speed of movement around the nearest gravitational mass per 24hrs, which it would because each planet and moon has a certain amount of metal in it's core, it would mean that the more metal you had in your planet's core the faster your planet would rotate, thus causing to time to be faster. On the Earth it just so happens that we have the perfect amount of iron and nickel in our core that we have the perfect amount of sunlight a day (not taking weather into consideration). But on the moon time would be much slower, mainly because the planet doesn't have the same percentage of metals in it's core.
This would suggest the 4th dimension being a force, rather than a new direction of motion. What do you think?