Jesus forgave a paralytic, but the critics of Jesus questioned how He could do that, since it was a prerogative of God alone.
Jesus questioned them on why they were questioning Him. Then He followed that with this,
“Which is easier, to say to the paralytic, ‘Your sins are forgiven you,’ or to say, ‘Arise, take up your bed and walk’? But that you may know that the Son of Man has power on earth to forgive sins”—He said to the paralytic, “I say to you, arise, take up your bed, and go to your house” (Mark 2:9–11).
Let us answer the question of Jesus. Which is easier to say: Your sins are forgiven, or Arise, take up your bed and walk?
It is easier to say, Your sins are forgiven, because we see no visible display that forgiveness has happened. Therefore, Jesus told the man to Arise, take up your bed, and go to your house, demonstrating that Jesus had divine authority in the realm of the flesh, hence He had authority in the realm of the spirit.
Jesus is God.