This world has not become heaven because we have not used heavenly

power within each of us. and we have not been so advanced like the life in heaven, it is our fault. Nevertheless we can go to heaven everyday and learn some wisdom.

And be trained again in our ability to help this world. We are connected with the kingdom of God or the Buddha's land through our spirit.

And if we keep this connection everyday, we will understand what great

 wisdom we possess. Then naturally every problem in this life and everything that we can not solve before we begin to be able to solve it.  

And we will live in a kind of heaven while we are still on earth.

Even though we have not been able to turn the whole world into heaven,

 we live in our own heaven.

When I say heaven, I mean the higher dimension like Buddha's land or

 the kingdom of God. The border between this physical level and the heavenly dimension we can cross.