Heaven exists, but we cannot find heaven because we are not looking in the right direction. Heaven exists within a dimension that we only vaguely know exists and we cannot find. Heaven is the higher plane, and the only way we can experience what exists on the higher plane is to reach the higher plane.

Imagine that your favourite toy is placed on the top shelf when you were very young. As you grow, you can vaguely remember that your favourite toy is on that shelf, but as time passes you begin to doubt that your favourite toy is on the shelf.

You cannot see on to the top shelf, and you cannot reach the top shelf. In time, you stop trying to reach the top shelf, and you begin to forget that your favourite toy is on the top shelf, until your favourite toy has gone from your mind completely.

As you grow, every time that you pass that shelf, you experience a vague feeling that there is 'something' on the top shelf which brings back fond feelings, but you cannot recall what that 'something' is.

You think of your favourite toy from time to time, and you recall your favourite toy with fondness, but you cannot remember what happened to your favourite toy. You may even look for your favourite toy from time to time, but you cannot find your favourite toy. Despite your good feeling whenever you pass the shelf, you do not associate the two feelings of fondness, even though the feelings of fondness are from the same source.

When you grow up and you are able to climb to the top shelf, you find your favourite toy there, and the wonderful memories which you had of your favourite toy come flooding back.

You suddenly realise that you had known where your favourite toy was all the time.