Transformation of Walter White

“Chemistry is the study of matter, but I prefer to see it as the study of transformation. It's growth, then decay, then transformation.”

Bryan Cranston’s unforgettable character on Breaking Bad is matter in transformation: while he raises his temperature, his density decreases. The temperature is the desire to live, the will of power, the self-confidence.
His blindness of greatness is such strong that he actually wears sunglasses. Long hair is the symbol of innocence. Beard represents the desire for transformation. As he leaves his hairs, Walter leaves his purity, and recovers it only when he has his final redemption. His desire to be Heisenberg is progressive and solidifies when he joyfully does his revenge.