Even if they didn't say that Jesus would come down the second time the same way He did the first, that doesn't mean it would be any different. God already showed us what is meant by coming down from Heaven....I don't see why the second coming should be any different. I see that as a test from God, if we learn from scriptures, or we follow our own wishful thinking.
We do learn from the Scriptures. Jesus did not say that He would come and be born again. The fact that He ascended in His physical body shows that He has no intention of discarding it and being born again.
But going back to your statement that apostles didn't see visions, we know that this was a vision according to old Testament:
"In my vision at night I looked, and there before me was one like a son of man, coming with the clouds of heaven. He approached the Ancient of Days and was led into his presence." Daniel 7:13
Notice that this was a vision according to Danial, but when Jesus narrated same prophecy, He did not say this is a vision. This would mean that the scriptures does not always say this was a vision or it is symbolic, for these things are mysteries of God that He reveals in the language of Spirit, and not physical and literal.
So just because Daniel saw a vision of something, then that mean that when the Apostles saw the same thing, then it must also have been a vision even though the Scriptures never give us a single indication that it was a vision? I'm sorry, but logic doesn't work like that.
Anyhow, a vision must be interpreted 'symbolically'. Baha'u'llah explained that by 'Clouds' is meant all those things that causes men not to recognize the Sun of Truth. Just as the Cloud causes people not to see the Sun, likewise the symbolic meaning of cloud in this verse is those things that causes 'doubt' in the mind of men and does not let them see the Truth with their own eyes.
Actually, clouds have always been a signifier of God's presence. See Exodus 13, where God leads the Hebrews in a cloud by day, and in a pillar of fire by night:
The Lord was going before them in a pillar of cloud by day to lead them on the way, and in a pillar of fire by night to give them light, that they might travel by day and by night. 22 [
x]He did not take away the pillar of cloud by day, nor the pillar of fire by night, from before the people.
Additionally, God appears on Mt. Sinai in a cloud:
Exodus 20:21 So the people stood at a distance, while Moses approached the thick
cloud where God
was.
And throughout the Book of Exodus, and even the rest of the Pentateuch, whenever a cloud shows up before the people of Israel or in the Temple, it is always said that God is there in the cloud, or that the Lord is there, or that the glory of the Lord is there. We see this throughout the books of Kings and of Chronicles and in the prophets. Psalm 104:3 says that the Lord makes the clouds His chariots. The prophets, such as Ezekiel, that the glory of the Lord was in the form of a cloud, as in Ezekiel 1:28 and 10:4.
When Jesus said that He would be coming on the clouds of Heaven, it was only then that the Sanhedrin tore their robes and convicted Jesus of blasphemy. Why? Because the Jews recognized from the Scriptures that by saying He would come on the clouds of Heaven, the Lord was equating Himself with God, and identifying Himself as God. The Jews knew very well what this saying of Jesus meant from the Jewish Scriptures, and they knew it to be Jesus identifying Himself as divine.
Except, those verses are figurative.
According to your own opinion.
It wouldn't make sense if Jesus said 'Watch', just because you don't know 'When' He comes. If He comes down from sky literally, and prior to His coming all those stars fall, Sun is darkened..etc, it makes no difference if you watch or not for if all these wonderful events were to happen literally You would know and recognize Him surely, then it is meaningless Jesus would emphasize several times 'watch'....Therefore the only reason that Christ would say 'Watch', is so that we don't fail recognizing Him. By watch is meant being spiritually awake to recognize Him.
Well, He did say to watch, just because we don't know when He is coming. Indeed, how can we properly watch for the coming of the Lord if we don't even know how He will come in the first place? But rather, every single time Jesus tells us to watch for His coming, He says that He will come
at a time we don't expect. Not in a manner we don't expect, but at a time we don't expect. Let me show you from the Scriptures:
St. Matthew's Gospel:
“Therefore be on the alert, for you do not know which day your Lord is coming. 43 But be sure of this, that if the head of the house had known at what time of the night the thief was coming, he would have been on the alert and would not have allowed his house to be broken into. 44 For this reason you also must be ready; for the Son of Man is coming at an hour when you do not think He will. 45 “Who then is the faithful and sensible slave whom his master put in charge of his household to give them their food at the proper time? 46 Blessed is that slave whom his master finds so doing when he comes. 47 Truly I say to you that he will put him in charge of all his possessions. 48 But if that evil slave says in his heart, ‘My master is not coming for a long time,’ 49 and begins to beat his fellow slaves and eat and drink with drunkards; 50 the
master of that slave will come on a day when he does not expect him and at an hour which he does not know, 51 and will cut him in pieces and assign him a place with the hypocrites; in that place there will be weeping and gnashing of teeth.
25 “Then the kingdom of heaven will be comparable to ten virgins, who took their lamps and went out to meet the bridegroom. 2 Five of them were foolish, and five were prudent. 3 For when the foolish took their lamps, they took no oil with them, 4 but the prudent took oil in flasks along with their lamps. 5 Now while the bridegroom was delaying, they all got drowsy and
began to sleep. 6 But at midnight there was a shout, ‘Behold, the bridegroom! Come out to meet
him.’ . . . 13
Be on the alert then, for you do not know the day nor the hour.
And in St. Luke's Gospel, chapter 12:
“But [r]be sure of this, that if the head of the house had known at what hour the thief was coming, he would not have allowed his house to be [s]broken into. 40
You too, be ready; for the Son of Man is coming at an hour that you do not [t]expect.” 41 Peter said, “Lord, are You addressing this parable to us, or to everyone
else as well?” 42 And the Lord said, “Who then is the faithful and sensible steward, whom his master will put in charge of his [
u]servants, to give them their rations at the proper time? 43 Blessed is that slave whom his [
v]master finds so doing when he comes. 44 Truly I say to you that he will put him in charge of all his possessions. 45 But if that slave says in his heart, ‘My master [
w]will be a long time in coming,’ and begins to beat the slaves,
both men and women, and to eat and drink and get drunk; 46
the master of that slave will come on a day when he does not expect him and at an hour he does not know, and will cut him in pieces, and assign him a place with the unbelievers. 47 And that slave who knew his master’s will and did not get ready or act in accord with his will, will receive many lashes, 48 but the one who did not know
it, and committed deeds worthy of [
x]a flogging, will receive but few. From everyone who has been given much, much will be required; and to whom they entrusted much, of him they will ask all the more.
So as you can see, it is the time of the Lord's coming we don't know, not the manner in which He will come.