According to Osho, Aham Brahmasmi is the Upanishadic declaration of enlightenment: ‘I am the ultimate; the divine is my own innermost being.’ It denies any God outside and affirms Brahman as one’s very self. That living realization is what sages call Sachchidanand—pure being (Sat), consciousness (Chit), and bliss (Anand)—so to know ‘I am Brahman’ is to awaken to that triune essence within.
It means the real you is the same as the ultimate truth—felt inside as being here, aware, and joyful.