The Binding Of Isaac

Imagine being told that you have no choice but to murder your own son. How would you deal with that situation? Disbelief? Bargaining? Rebellion? There are many ways that we could choose to try and come to terms with that sort of task, but imagine being Abraham. He is literally commanded by God to sacrifice his son Isaac as an offering. What is the point of this moral conundrum? Has Abraham lost his mind?