Why did gospel show jesus is God but at the same time he is only the son of man ?

he called himself the son of Man, he said the Father and I are One but later there is another verse, the Father is greater than I, if Jesus is God's son then why does the Holy Spirit is special when he said the sin against the Holy Spirit would never be forgiven? and Jesus in the calvary said Lord Lord why... show more he called himself the son of Man, he said the Father and I are One but later there is another verse, the Father is greater than I, if Jesus is God's son then why does the Holy Spirit is special when he said the sin against the Holy Spirit would never be forgiven? and Jesus in the calvary said Lord Lord why have you abandoned me?
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