The answer
Our Lord meant both the marriage and the immortality. He was answering the Sadducees who did not believe in the resurrection. His answer to them meant that in the resurrection the bodies of the saints shall be raised incorruptible and glorious like pure and holy spirits. St. Jerome says that we will be raised from the dead carrying our own gender but free from all fleshly desires. Marriage is an institution that God designed specifically for the procreation of the human race. When death is no longer a possibility, procreation will no longer be a necessity. Man would not be governed by physical laws but will be "like angels" instead. That is, he will share the spiritual immortal nature of angels.Answered by His Eminence Metropolitan Youssef (opens in a new tab)