Sai Baba Gita - A Pure Heart is Free of Attachment and Illusion

As part of your activities, you may perform the various scripturally-prescribed sacrifices and ceremonial rituals. But, as previously mentioned, these can take you only up to heaven. Krishna informed Arjuna that there was a state which was far beyond and far more sacred than heaven. "Do not consider heaven as a permanent place,"
Krishna said. "When you have exhausted your merits you will have to leave heaven and return to earth. Heaven is only a temporary camp; you will not be able to reside there permanently. Perhaps you think that in heaven you will be able to enjoy so many bodily and mental pleasures. But, in truth, the pleasures you get there are only a little greater than those you get here on earth. There is a state which is far, far beyond; far more sacred. That state may be reached by identifying yourself with God, by associating yourself with the atma, by merging your small individual self with your highest eternal self. In order to attain this state you will have to become totally desireless and selfless; you will have to perform all your actions without expecting any fruits from them."