He then expands on what he must experience. This verse uses another figure of speech to refer to Calvary.
We love our Saviour the more, because he was will to endure the agony of making an atonement. It was love that made him go through with it. Christ is giving us a glimpse into his heart. Apart from all his other attributes, he is a man of infinite self-control, and able to face this task of incalculable difficulty.