When instructing his disciples just before his crucifixion, Jesus said: "Yet a little while, and the world seeth me no more; but ye see me: because I live, ye shall live also".

(John 14:19) Thus he establishes the fact that his faithful disciples will see him as he is, but that the world will see him no more.

And why is this true?
We answer, Because Jesus was raised from the dead not a human but a spirit being, with divine nature or organism.

The nature is determined by the organism or body.

He now has a glorious body, which no man hath seen nor can look upon and live.