Paul spoke of The resurrection and judgement day to come which had been made sure because Christ was raised from the dead. Again let me say that the problem isn't one of understanding nearly as much as it is of accepting what has been revealed in the Bible. This subject has been, and to this day continues to be, one of the most controversial on the religious scene among professed followers of, and believers in, the Christ. The problem lies with men not God's revelation. Tradition and Creedal affirmations have been bound on would be followers of Jesus for so many generations that one can rarely get one to look into and accept the plain and simple teaching of Jesus and His Apostles on this subject.
Words have meanings.
They are vehicles which carry thoughts from one party to another. This means that whatever the original words meant then, they mean today. Anyone may purchase lexicons and Greek dictionaries and look up these words. For one who doesn't have such books and only has the Bible, let me assure you that the language of Scripture leaves no doubt whatsoever about this matter. The Bible says such things as the following.