If he is referring to the time-bound human ego, then “i think, therefore I am” makes sense. We begin to accumulate memories and conditioning when we are babies. From this collection, we construct a person with a name, cultural background, and parental teaching and examples. We then believe that this is who are are and therefore, “I am.” We create something solid out of a constantly changing whirl of atoms and we call it “me.”
It is more accurate to say, “I embody the eternal Soul of the Universe, therefore I am.” The smaller ego-me, consisting of thoughts, memories, opinions, fears, and beliefs is a transitory thing. It is changeable and constantly evolving. Are we going to call something that is in a continual state of flux “me?” But there is something that exists beyond our cognitive abilities: The Soul. It is the eternal principle of the Universe, contained in each one of us and it is beyond the limitations of thought.