See 1 Corinthians 15.
Saint Paul wrestles in this chapter to explain the Resurrection's promise. For example, refer to 15:50-53: "Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God; neither doth corruption inherit incorruption. / Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed, / In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed. / For this corruptible must put on incorruption, and this mortal must put on immortality."