God within is leading us always aright even when we are in the bonds of the ignorance; but then, though the goal is sure, it is attained by circlings… - Aurobindo Ghosh

The only necessity in this sadhana is to open yourself to the Divine Force; if one is open the necessary understanding or knowledge will come of itself through spiritual experience.

Sri Aurobindo
Letters on Himself and the Ashram, p.448

Differences of credal belief are to the Indian mind nothing more than various ways of seeing the one Self and Godhead in all. Self-realisation is the one thing needful; to open to the inner Spirit, to live in the Infinite, to seek after and discover the Eternal, to be in union with God, that is the common idea and aim of religion, that is the sense of spiritual salvation, that is the living Truth that fulfils and releases. This dynamic following after the highest spiritual truth and the highest spiritual aim are the uniting bond of Indian religion and, behind all its thousand forms, its one common essence.

It is not by these means [modern humanism and humanitarianism, idealism, etc.] that humanity can get that radical change of its ways of life which is yet becoming imperative, but only by reaching the bed-rock of Reality behind,... not through mere ideas and mental formations, but by a change of the consciousness, an inner and spiritual conversion. But that is a truth for which it would be difficult to get a hearing in the present noise of all kinds of many-voiced clamour and confusion and catastrophe.... Science has missed something essential; it has seen and scrutinised what has happened and in a way how it has happened, but it has shut its eyes to something that made this impossible possible, something it is there to express. There is no fundamental significance in things if you miss the Divine Reality; for you remain embedded in a huge surface crust of manageable and utilisable appearance. It is the magic of the Magician you are trying to analyse, but only when you enter into the consciousness of the Magician himself can you begin to experience the true origination, significance and circles of the Lila.... Another danger may then arise [once materialism begins to give way]... not of a final denial of the Truth, but the repetition in old or new forms of a past mistake, on one side some revival of blind fanatical obscurantist sectarian religionism, on the other a stumbling into the pits and quagmires of the vitalistic occult and the pseudo-spiritual'mistakes that made the whole real strength of the materialistic attack on the past and its credos. But these are phantasms that meet us always on the border line or in the intervening country between the material darkness and the perfect Splendour. In spite of all, the victory of the supreme Light even in the darkened earth-consciousness stands as the one ultimate certitude....