But I have a baptism to be baptized with; and how am I straitened till it be accomplished! – Luke 12:50

For He shall be delivered unto the Gentiles, and shall be mocked, and spitefully entreated, and spitted on: and they shall scourge Him, and put Him to death… – Luke 18:32,33

The thought of our perishing He could not bear: that was not to be tolerated. He would suffer all imaginable and unimaginable woe sooner than desert the cause He had espoused. He was straitened-so He described it-straitened till His labor was accomplished. He was like a man pent up against His will: He longed to be discharging His tremendous task. He had an awful work to do, an agonizing suffering to bear, and He felt fettered until He could be at it: “How am I straitened till it be accomplished!” He was as a hostage bound for others, longing to be set free. He longed to be bearing the penalty to which He had voluntarily subjected Himself by His covenant suretyship. He therefore thought upon that “obedience unto death” which He was determined and resolved to render.

He had an eye all the while to you and to me. While He was thinking of death, He was chiefly regarding those for whom He would suffer. I doubt not that there flashed before that mighty mind the individuals who make up the vast host of His redeemed; and among them there were insignificant individuals, such as we are. Out of His strong love to us, even to us, He determined to pay our ransom price in death: it was part of His solace that He would deliver you and me. “He loved me and gave Himself for me.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2212.cfm