Why - from "The Matrix"

Agent Smith is a machine - he can't understand why Neo keeps fighting. Neo is human and humans have free will, he chooses to keep fighting. Machines have no true consciousness.

"The only way we can achieve consciousness is by transformation from selfish to selfless. The arc of transformation is how we evolve consciousness.  This is why computers and artificial intelligence will never lead to true consciousness. Machines do not have the power to elevate from selfish to selfless through independent free will. Machines can have intelligence. But never consciousness. Consciousness demands a connection to a higher dimension."
—http://kabbalahstudent.com/this-is-consciousness/