Heaven is such that all who have lived well, of whatever religion, have a place there.
All religion relates to life, and the life of religion is to do good
A heavenly society is a harmony of many.
He who is in evil, is also in the punishment of evil.
Hell and Heaven are near man, yes, in him; and every man after death goes to that Hell or heaven in which he was, or to his spirit, during his abode in the world.
The nature of heaven is to provide a place there for all who lead good lives, no matter what their religion may be.