The heaven that Jesus said was “at hand” is an alternate dimension right here, right now on this planet. You decide through your intention, moment by moment, to live within heaven or not.
When our eyes are spiritually trained through meditation and spiritual discipline (what the East calls the opening of the third eye) we see everything and everyone differently.
If you see a world full of sinners you reside in hell.
If you see a world full of saints only then are you in heaven.
You can live in the paradise of heaven or you can continue creating hell for yourself by returning to the Earth school and following the path of endless deaths and rebirths until you discover the truth of Christ's message about paradise -
Enlightenment, that is complete self-control and awareness, is the only "heaven" Jesus has ever invited us to participate within.