Over the period known as the Kaliyuga, the Dark Age of Humanity, much of the Sacred Teaching vanished and a little remained to split into the various religions of today such as Buddhism, Christianity, Hinduism, Islam, Judaism, Zoroastrianism, Mithraism, Sikhism, Voodoo, Santeria, and so on. All of the religions claim a divine origin, which is true, but all have strayed, and even if all came together to form one religion, critical steps to attain the heavenly state are not found. There are inner and outer teachings to master; the outer is kindness to all breathing creatures that cry because all are one family living in the same abode upon the same air.
The religions previously mentioned are earthly religions, and to follow their doctrine to death leads to rebirth upon the earth, repeatedly until the Sacred Teaching is mastered. A serious problem is that their holy texts are translated from Sanskrit, Hebrew, Aramaic, Avestan, Arabic, and so on, as a common language rather than a Sacred Text. A result of the poor translation of their spiritual texts is a misguided doctrine and to follow does not result in the promise, i.e. eternal bliss in the heavenly state. The religions of the earth do not teach the Sacred Doctrine and as a result, today a hellish state exists upon the earth with a high number of people with a high degree of anger and low degree of morality.
If you have any interest in reaching the heavenly state, begin by following the moral teaching of kindness to any creature that grasps for the breath and cries. For those with a greater interest the knowledge of heaven for heaven is available on this site now for knowing and attaining. Here is a mantra from the Veda about the teaching of heaven spreading in the wrong direction.
The invisible protector of the universe comes down and back traveling the path, yet the knowledge of the good path directed with one aim has spread in many directions.
To be devoted to the doctrine, compassion is like behaving properly towards a lover with an inner part produced in meditative absorption.