4059. Each individual phrase in these verses is clear evidence of the existence of an internal sense, and of the fact that unless that sense is understood no one can possibly know what is implied in any of the following descriptions: The sun will be darkened, and the moon also; the stars will fall from heaven, and the powers of the heavens will be shaken; the Lord will appear in the clouds of heaven; and the angels will sound a trumpet and in so doing will gather together the elect. Anyone who is not acquainted with the internal sense of these words will believe in a literal fulfilment of such events - that the world really is going to perish, together with everything visible in the universe. It is not the destruction of the world that is meant however by a last judgement but the coming to an end or the ruination of the Church as regards charity and faith; see 3353. The same is also quite evident from the words which come later on in this same chapter in Matthew,

At that time two will be in the field; one will be taken, the other left. Two women grinding; one will be taken, the other left. Matthew 24:40-41.