St. Thomas Aquinas on whether all will die before the Final Judgement?

In the ***Summa Theologiae***, St. Thomas argues that all will die and rise again when Jesus returns. But this seems to be in contradiction to St. Paul, who wrote: > "We who are still alive and are left will be caught up together with them in the clouds to meet the Lord in the air. And so we will be with the Lord forever." (1 Thessalonians 4:17) This suggests that those still alive when Jesus comes will not suffer any physical death. But, St. Paul also seems to contradict himself when he says: > "What you sow does not come to life unless it dies." (1 Corinthians 15:36) Also, wasn't prophet Elijah taken bodily to heaven? And the Blessed Virgin too? How can we reconcile this problem(s), in the light of what the Church teaches?