So as 'fully man' could He suffer what man suffers and susceptible to temptation and falling into Satans trap as Adam did...
The plan of salvation was determined before hand, and could not fail. There was no risk.
For instance these texts which use ὁρίζω:
Luke 22:22
22 And truly the Son of man goeth, as it was determined: but woe unto that man by whom he is betrayed! (KJV)
It was DETERMINED that Jesus would go to the cross for us. There was zero risk of failure.
23 Him, being delivered by the determinate counsel and foreknowledge of God, ye have taken, and by wicked hands have crucified and slain (KJV)
It was by the determinate counsel of God, and His foreknowledge that Jesus would be crucified for us. It could not happen otherwise. There was zero risk of failure.
2 And he commanded us to preach unto the people, and to testify that it is he which was ordained of God to be the Judge of quick and dead. (KJV)
He is ordained of God to be the Judge of quick and dead--which He could not do if He lost His eternal existence. But that was impossible, because He could be no other than the Judge of the quick and dead--It was ordained of God. There was zero risk of failure.
or προορίζω
27 For of a truth against thy holy child Jesus, whom thou hast anointed, both Herod, and Pontius Pilate, with the Gentiles, and the people of Israel, were gathered together, 28 For to do whatsoever thy hand and thy counsel determined before to be done. (KJV)
It could be no other way but that Jesus would go to the cross for us. God's hand and Gods counsel determined before that it would be done. There was zero risk of failure.
7 But we speak the wisdom of God in a mystery, even the hidden wisdom, which God ordained before the world unto our glory: 8 Which none of the princes of this world knew: for had they known it, they would not have crucified the Lord of glory. (KJV)
God ordained before the world for our glory that Jesus would be crucified for us. There was zero risk of failure.
The Servant would not fail:
Jesus was tempted. He could not fail, because it was declared He shall not fail. And that God would keep Him.
1 “Behold! My Servant
My Elect One in whom My soul delights!
I have put My Spirit upon Him;
He will bring forth justice to the Gentiles.
2 He will not cry out, nor raise His voice,
Nor cause His voice to be heard in the street.
3 A bruised reed He will not break,
And smoking flax He will not quench;
He will bring forth justice for truth.
4 He will not fail nor be discouraged,
Till He has established justice in the earth;
And the coastlands shall wait for His law.”
5 Thus says God the LORD,
Who created the heavens and stretched them out,
Who spread forth the earth and that which comes from it,
Who gives breath to the people on it,
And spirit to those who walk on it:
6 “I, the LORD, have called You in righteousness,
And will hold Your hand;
I will keep You and give You as a covenant to the people,
As a light to the Gentiles,
7 To open blind eyes,
To bring out prisoners from the prison,
Those who sit in darkness from the prison house.
8 I am the LORD, that is My name;
And My glory I will not give to another,
Nor My praise to carved images.
9 Behold, the former things have come to pass,
And new things I declare;
Before they spring forth I tell you of them.” (NKJV)
We know the true end by what He told us. And it is not failure. There was zero risk of failure, because God foreknew and determined before hand.
