Thither will the eagles be gathered together.........

This is good teaching...not what you might expect, not the rapture so many expect. See John Gill notes....for the pre-modern interpretation.

Luk 17:34    I tell you, in that night there shall be two men in one bed; the one shall be taken, and the other shall be left.

Luk 17:35    Two women shall be grinding together; the one shall be taken, and the other left.

Luk 17:36    Two men shall be in the field; the one shall be taken, and the other left.

Luke 17:34

I tell you, in that night,.... Of affliction and calamity, that shall be upon the Jewish nation, and which is before called that day, Luk 17:31 and therefore is not to be understood literally of the night:

there shall be two men in one bed; this is said agreeably to the time, the night before mentioned, that being the time to be in bed, at rest and asleep; for they that sleep, sleep in the night; and still suggests the security the people of the Jews would be in, at the time of their destruction. The word "men" is not in the text, it is only, "there shall be two in one bed"; and may as well be understood of a man and his wife, since it is not so usual for two men to lie in one bed; and this the rather more strongly expresses the distinguishing providence of God in saving one, and suffering the other to be taken and lost: the words may be rendered, "there shall be two upon one couch": that is, sitting together at supper, which was also in the night season: it was the custom of the ancients to sit upon beds, or couches, at meals; and they had a bed, or couch, which held two persons only, and was called Biclinium (h): and so this likewise intimates, that the destruction of the Jews would be at a time when they were thoughtless of it, and were eating and drinking, as in the days of Noah and of Lot, Luk 17:27.

The one shall be taken; by the Roman soldiers:

and the other shall be left; being, by one providence or another preserved; which is mentioned, to show the distinction God will make in his providence, and to encourage believers to trust in it.

(h) Vid. Alstorph. de Lectis Veter. c. 15. p. 90, 91.

The one shall be taken and the other left; the Roman soldiers entering the mill, will lay hold on the one, and carry her away with them, and leave the other; and for which no other reason can be given, but the sovereign will and providence of God, which should overrule and dispose the minds of these men, to act in such a manner.

the one shall be taken, and the other left: the circumstances attending these several, instances show, that they cannot be considered as expressive of the use and effect of the preaching of the Gospel, that being the savour of life unto life to some, and the savour of death unto death to others, some being effectually called by it, and others being left to die in their sins; since these men and women are said to be either in a bed asleep, or on a couch feasting, or grinding in a mill, or at work in the field, and so not in proper places, and at leisure to hear the Gospel preached. The whole verse is left out in the Ethiopic version, and in some Greek copies; though it is in the Syriac, Arabic, and Persic versions, and in the Complutensian edition, and in some ancient copies, as Beza observes.

Luk 17:37    And they answered and said unto him, Where, Lord? And he said unto them,Wheresoever the body is, thither will the eagles be gathered together.

thither will the eagles be gathered together; the Roman army, whose ensign was the eagle; these will come, seize upon them, and take them and devour them, as they did: the Persic version renders it, "vultures"; See Gill on Mat 24:28. These words can by no means be understood of sinners fleeing to Christ for eternal life and salvation; nor of the gathering of saints to him, at the last day; for how fitly soever such persons may be compared to "eagles", the word "body", or "carcass", as in Mat 24:28 and which is so read in some copies here, is not so suitable to Christ; and especially at his glorious appearing; and besides, the words are an answer to a question, where such persons would be, who would be taken and destroyed, when others would be left, or preserved; and manifestly refer to the body, or carcass of the Jewish people at Jerusalem, and other fortified places; where they should think themselves safe, but should not be so, the Roman armies gathering about them, and seizing them as their prey: it is yet a more strange interpretation, which is proposed by a very learned man (i); that by the "eagle" is meant, Christ; and by "the body", or "carcass", the church in the times of antichrist; and by "gathering" to it, the coming of Christ: for though Christ may be said to bear and carry his people, as the eagle bears and carries its young upon its wings, which he observes from Exo 19:4 yet not a single eagle, but "eagles", in the plural number, are here mentioned; which shows, that not a single person, as Christ, but many are here intended, even legions of Roman soldiers: nor can the church of Christ be compared to a dead and filthy carcass, in the worst of times, even in the times of antichrist; for however forlorn, distressed, and afflicted her condition is, she is kept alive, and in some measure pure from antichristian pollutions; and is represented by a woman, to whom two wings of a great eagle are given (wherefore she should rather be designed by the eagles) to fly with into the wilderness, where she is preserved and nourished for a time, and times, and half a time, Rev 12:14. Nor is Christ's coming ever expressed by the gathering of him to his people; but on the other hand, they are always said to be gathered unto him; see 2Th 2:1.