a good rule when reading the Word is to read three to four verses before and after the verse to get the contents of the verse if you have done this I don't know why this verse would be confusing to you !
sometime you may have the read the whole verse, but must of the time the above rule will work
1co 15:47The first man is of the earth, earthy: the second man is the Lord from heaven.1co 15:48As is the earthy, such are they also that are earthy: and as is the heavenly, such are they also that are heavenly.1co 15:49And as we have borne the image of the earthy, we shall also bear the image of the heavenly.1co 15:50Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God; neither doth corruption inherit incorruption.1co 15:51Behold, I show you a mystery; We shall not all sleep, but we shall all be changed,1co 15:52In 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.1co 15:53For this corruptible must put on incorruption, and this mortal must put on immortality.1co 15:54So when this corruptible shall have put on incorruption, and this mortal shall have put on immortality, then shall be brought to pass the saying that is written, Death is swallowed up in victory.1co 15:55O death, where is thy sting? O grave, where is thy victory?1co 15:56The sting of death is sin; and the strength of sin is the law.1co 15:57But thanks be to God, which giveth us the victory through our Lord Jesus Christ.