As a body, you just can't see a Brahman. What is Brahman? The ultimate reality of this universe. That in which this entire universe appears. And then the statement, you are Brahman, Dhatthwamasi, then it makes sense. You are Brahman only when first we realize I am the witness consciousness. This step will take us to our real nature as pure consciousness.
Swami Sarvapriyananda teaches the Katha Upanishad, one of India's most revered texts which is also a part of the Vedas. It is a collection of philosophical poems representing a conversation between the sage Naciketas and Yama (god of death). They discuss the nature of Atman, Brahman and Moksha(liberation).