Jesus' human nature included both a human body and soul. Man sinned with both soul and body and therefore Jesus had to atone for both. Jesus suffered in both:

a. Soul - "Then saith He unto them, My soul is exceeding sorrowful, even unto death: tarry ye here, and watch with Me" (Matthew 26:38).

b. Body - "Who His own self bare our sins in His own body on the tree, that we, being dead to sins, should live unto righteousness: by whose stripes ye were healed" (I Peter 2:24).

Jesus' soul and body were truly human and yet sinless. This was possible because Mary, a human, was His mother; and God was His Father. Due to God the Holy Spirit's creating of Jesus' human nature, Jesus was born without original sin. Jesus did not have a human - a descendant of Adam - as His father. As a divine Person, He could do no actual sin. Jesus was a perfectly sinless Person in both His divine and human natures.

The Lord Jesus always had His divine nature. He always has been God, and always will be. From eternity to eternity Christ is God. He did not always have His human nature, however. He assumed His human nature from the virgin Mary approximately 2,000 years ago.

The two natures of the Lord Jesus can be clearly seen in numerous scriptural accounts. Read Luke 8:22-25:

Now it came to pass on a certain day, that He went into a ship with His disciples: and He said unto them, Let us go over unto the other side of the lake. And they launched forth. But as they sailed He fell asleep: and there came down a storm of wind on the lake; and they were filled with water, and were in jeopardy. And they came to Him, and awoke Him, saying, Master, Master, we perish. Then He arose, and rebuked the wind and the raging of the water: and they ceased, and there was a calm. And He said unto them, Where is your faith? And they being afraid wondered, saying one to another, What manner of man is this! for He commandeth even the winds and water, and they obey Him.

How can we distinctly observe Jesus' human and divine natures in this history?

And the angel answered an said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.

- Luke 1:35

Behold, a virgin shall be with child, and shall bring forth a son, and they shall call His name Emmanuel, which being interpreted is, God with us.

- Matthew 1:23

In the beginning was the Word, and the Word was with God, and the Word was God.

The same was in the beginning with God.

- John 1:1-2