The great insight of Advaita Vedanta is, the reality you reach through the God-centred approach or the ‘that’ based approach, and the reality you reach through the Self-inquiry approach or the ‘thou’ based approach, is exactly the same reality. By bringing them together - Atman is Brahman, ‘That thou art’, the stunning insight is - that indubitable personal existence is also the infinitude of God. The unproblematic, infinite nature of God and the indubitable certain existence of the self are brought together. You have an infinite existence which is also beyond doubt.
