How can he be both?
Thank you for your question.
Jesus is called the ‘son of man’ in order to identify with those he came to save.
Whilst he was God’s son by the virgin birth he was also the son of Mary – a son of man.
This is important because he could not be a sacrifice for sins if he was not like those of us he came to save.
The wonderful thing about Jesus is that even though he shared our nature he never sinned. He always did those things which he knew would please his Father in heaven.
It is because of that God raised him from the dad and offers us the hope of everlasting if if was associate ourselves with Jesus through baptism – total immersion in water.