The oldest texts from India (though transmitted orally for much of that time) are the Vedas. These texts got explained in the Upanishads – the philosophical basis of a large portion of Hinduism since.
The basis of Hindu thought about enlightenment or Moksha is already found in those Upanishads.
Another important doctrine in most of Hinduism is that of karma & reincarnation.
A controversy is the issue of a personal God in Hinduism. It is without doubt that most Hindu’s pray to a God, but do they really believe that God is a person? Blavatsky and many Hindu philosophers think otherwise.
