In those days was Hezekiah sick unto death. And the prophet Isaiah the son of Amoz came to him, and said unto him, Thus saith the Lord, Set thine house in order; for thou shalt die, and not live.
Then he turned his face to the wall, and prayed unto the Lord, saying,
I beseech thee, O Lord, remember now how I have walked before thee in truth and with a perfect heart, and have done that which is good in thy sight. And Hezekiah wept sore.
And it came to pass, afore Isaiah was gone out into the middle court, that the word of the Lord came to him, saying,
Turn again, and tell Hezekiah the captain of my people, Thus saith the Lord, the God of David thy father, I have heard thy prayer, I have seen thy tears: behold, I will heal thee: on the third day thou shalt go up unto the house of the Lord.

And he was withdrawn from them about a stone’s cast, and kneeled down, and prayed,
Saying, Father, if thou be willing, remove this cup from me: nevertheless not my will, but thine, be done.

COMMENTARY

Thus saith the Lord, Set thine house in order; for thou shalt die
Thus saith the Lord, I have heard thy prayer, I have seen thy tears: behold, I will heal thee
Yesterday we examined how God is able to effect his purposes over an array of possible outcomes. Our future will be one thing, but we get to choose that one from a plethora of different options. Hezekiah’s life could have ended after the pronouncement of the prophet, but he asked if there was another option and was told yes. God was willing to heal Hezekiah, because to do so did not frustrate the greater arc He intended for humanity.

If thou be willing, remove this cup from me: nevertheless not my will, but thine, be done
When Jesus sought to know if there was another path available, though, the answer was no. It was essential to God’s plans that this moment play out in one very specific way. The atonement had to happen for mankind’s redemption to occur. This does not deny Jesus’s ability to choose, mind you, but one would assume that if Jesus had been unwilling to fulfill this one essential path, then God would have had foreknowledge of such and would never have even created humanity, as it would have been destined to damnation.
God has set bounds on each of our lives. There are things that we can do and there are things that we cannot. There are alternate paths available if we ask for them, and there are other alternate paths which can never be. We do not know exactly what bounds God has set for us, but He does, and we are free to inquire. He may not show us the entire chessboard, but He might show us a part.