You are definitely sure that 'you are', only then everything else is! Not before that. Since the 'I am' lies at the very base of everything and is common to all, does it not form the totality of being? Throwing aside everything, come back to this sense of 'presence' or 'being' in all its purity and it will heal your mind. The use of the word 'heal' is very important as it clearly suggests that the mind or whatever has been loaded on the 'I am' afterwards is a pain, an illness that needs to be cured. There is also here a hint towards something that is beyond the 'I am'.