That because of his divine nature his obedience and suffering would be perfect and effective; and also that he would be able to bear the righteous anger of God against sin and yet overcome death.
How do we know that Jesus fully is God?
He claimed to be God (Jn 5:17-18“My Father is working”; 8:58 “I AM”)
He had divine attributes (See below)
He was active in divine activities. John 5:17-18-23;
Forgives sins. Luke 5:20-26
Grants eternal life. John 10:28
What are the implications of Jesus being fully God?
Because He is God, we have a responsibility to obey Him
What are the implications if He was not fully God?
If he was not God, he could not have lived a perfect life. If He did not live a perfect life, He could not have atoned for our sins, because He would have had to pay for His own.