And Jesus, full of the Holy Spirit, returned from the Jordan and was led by the Spirit in the wilderness for forty days, being tempted by the devil. And he ate nothing during those days. And when they were ended, he was hungry.

The devil said to him, “If you are the Son of God, command this stone to become bread.”
And Jesus answered him, “It is written, ‘Man shall not live by bread alone.’ (Deuteronomy 8:3)”

And the devil took him up and showed him all the kingdoms of the world in a moment of time, and said to him,

“To you I will give all this authority and their glory, for it has been delivered to me, and I give it to whom I will. If you, then, will worship me, it will all be yours.”
And Jesus answered him, “It is written, ‘You shall worship the Lord your God, and Him only shall you serve.’ (Deuteronomy 6:13)”

And he took him to Jerusalem and set him on the pinnacle of the temple and said to him,

“If you are the Son of God, throw yourself down from here, for it is written, ‘He will command His angels concerning you, to guard you,’ and ‘On their hands they will bear you up, lest you strike your foot against a stone.’ (Psalm 91:11-12)”
And Jesus answered him, “It is said, ‘You shall not put the Lord your God to the test.’ (Isaiah 7:12)”

-- Luke 4:1-12 (ESV); Matthew 4:1-10

In short the devil was basically saying:

1. That God is a bad God, because God "failed" to provide bread to Jesus.
2. Then the devil offered an alternative plan to Jesus: authority, glory and deliverance of all the kingdoms in exchange for worshipping the devil instead of God. When Jesus declined,
3. the devil tried to make Jesus doubt in God's protection.

None of these temptations would make any sense if Jesus was God. Yet the devil did not make a mistake, but knew exactly who God was (James 2:19).

If Jesus was God, he would have given the lead, yet Jesus was led by another Spirit (Matthew 4:1; Luke 4:1).

God cannot be tempted (James 1:13), this would have been a pointless exercise for the devil (Matthew 4:1; Luke 4:2; Hebrews 4:15) if Jesus was God.

If Jesus was God, the devil would have requested Jesus to proof that, but instead the devil only asked Jesus to only proof that he is the son of God (Luke 4:3,9).

In the same context Jesus defended himself with Deuteronomy 8:3 which teaches that mankind should rather obey God, then to satisfy hunger. Jesus applies that scripture to his own situation (Luke 4:4) which implies:

• Jesus is part of mankind, because the scripture applied to him,
• Jesus would rather starve than to be disobedient his God.

If Jesus was truly tempted, as written in Matthew 4:1 and Luke 4:2, then it would mean that Jesus did not have all authority at that moment, otherwise the devil's offer for more kingdoms (Matthew 4:9; Luke 4:5-6) would not have been a temptation to Jesus, because God already owns everything (Psalm 24:1).

Jesus referred to God as Someone distinct** (Matthew 4:6-7; Luke 4:12).

If Jesus was God, it would not have made sense for the devil to even try to ask Jesus to worship him (Luke 4:7) because God would have had no motivation to worship anything. But if Jesus was a human who know that he would be crucified, then this temptation could have been a convenient shortcut to bypass the suffering he knew he would endure and instantly receive power and glory with very little effort and still "save" his people.

Jesus never told the devil that the devil should worship him as Jesus, but instead warned the devil that only God should be worshipped as another party. This implies that both he and the devil knew that he is not God. (Matthew 4:10; Luke 4:8)

The devil quotes a scripture of God commanding His angels to protect Jesus (Matthew 4:5-7; Luke 4:9-11). If Jesus was God then the devil would have quoted the wrong scripture and Jesus would have had no need to respond. Yet, the devil knew exactly who and what God was (James 2:19).