Let's assume Y=X^2.
A two dimensional curve consists of X and Y.
The projection of Y=X^2 on X axis is a simple straight line. (Y=0)
I think now we live in X axis( Y=0 or this world).
When we die we will see and touch newer axises. (X and Y or Life after death).
We will just see the more complete world.
What we saw once as a simple straight line would turn out to be a curve with it's extremums.
We will just see the reality behind the clouds of distances and spaces and time.
So nothing will be destroyed or disappeared.