In the beginning the universe is nothing more than an infinitely dense collection of it's most basic elements. At some point a chain reaction is sparked causing a massive explosion resulting in the universe expanding to the form we all know and love today.
Everything with mass has a gravitational pull, all objects with mass are attracted to all other objects with mass. It is this force, gravity, that is constantly pulling the universe back together. Gravity is not strong enough to instantly halt the universe's expansion, but it does continually slow the expansion. Eventually gravity will slow the expansion to the point of stopping it, at which point gravity will begin pulling the universe back together.
Essentially all objects in the universe will be 'falling' towards each other, accelerating as they collapse. Because the force, gravity, that will accelerate the universe's collapse is the same force that previously slowed the universe's expansion, the collapse will accelerate at the same rate it had been decelerating. All matter will eventually collide at the universe's center with a force exactly equal to that of the big bang, in fact this force is the big bang.
The collision of all matter in the universe causes a massive explosion, we know as the big bang, resulting in the universe expanding. This is a cycle that never ends, the universe expands, contracts, collides and expands again.
Inside this expanding universe exists a race of intelligent beings called humans. To this point humans have come down a long and arduous path. Along this path humans have created a great many things, from fire to space shuttles, wheels to computers, creation runs in our blood. Our creative prowess shows no signs of faltering, in the future we will continue to create new and wondrous technologies capable of great feats.
Using our intelligence we can create powerful particle colliders in order to harness the power of gravity. Using the power of gravity we will be able to move planets, solar systems, even galaxies! We will rearrange the entire universe to our liking, just as we can do today with the elements on Earth.
With the assistance of powerful computers our future selves will be able to calculate exactly how the universe should be arranged in order to create a chain reaction when the universe eventually collides at it's center. This chain reaction will result in an explosion intelligently designed by us. In the 'end' we make our final and greatest creation... The Universe!
You might think that rearranging the entire universe is a huge task that would take quite a long time. The good news is that we have plenty of time in which to make this great accomplishment.
As one travels faster through the universe they experience less time. For example, if person B were to travel 600 light years and back at the speed of light while person A remained seated on Earth, person B would not have noticed the passage of any time while person A would have aged 1200 years. Likewise it is true that as a person slows down they experience more time. We are part of the universe and as the universe's expansion slows we slow with it and thus we continually experience greater and greater amounts of time. The closer we get to the point at which the universe begins to collapse the longer it takes to get there.
It literally takes forever to reach the point when the universe begins to collapse. Because of this we have an infinite amount of time in which to create the universe, of which we are a part of. We are the intelligent force in the universe, we are the intelligent force behind the universe, together we are the creator.