Allah (Glorified and Exalted be He) Alone knows what lies in the recesses of the inner self and all thoughts, secrets and obsessions that preoccupy one's mind. Allah (Glorified be He) says:
And if you (O Muhammad صلى الله عليه وسلم) speak (the invocation) aloud, then verily, He knows the secret and that which is yet more hidden.
Allah (Exalted be He) also says:
Is not Allâh Best Aware of what is in the breasts of the ‘Alamîn (mankind and jinn).
And Allâh knows what you conceal and what you reveal.
He knows what is in the heavens and on earth, and He knows what you conceal and what you reveal. And Allâh is the All-Knower of what is in the breasts (of men).
(Part No. 2; Page No. 10) Allah also says:
And your Lord knows what their breasts conceal, and what they reveal.
anyone who claims knowledge of people's inner selves and what they conceal has contended with Allah (Glorified and Exalted be He) in His Lordship and this is Kufr (disbelief) which Muslims should beware of.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.