A.T. Robertson Commentary 1 Corinthians 15:45

"So also it is written, The first man Adam became a living soul. The last Adam [became] a life-giving spirit." — 1 Corinthians 15:45 (ASV)

Became a living soul (εγενετο εις ψυχην ζωσαν). Hebraistic use of εις in predicate from LXX. God breathed a soul (ψυχη) into "the first man."

The last Adam became a life-giving spirit (ο εσχατος Αδαμ εις πνευμα ζωοποιουν). Supply εγενετο (became). Christ is the crown of humanity and has power to give us the new body. In Ro 5:12-19 Paul calls Christ the Second Adam.