Luke 19:43 - Matthew Poole's English Annotations on the Holy Bible

Ver. 43,44. It is a plain prophecy of the final destruction of Jerusalem by the Roman armies, which came to pass within less than forty years after. The cause of that dreadful judgment is assigned, because thou knewest not the time of thy visitation. God's visitations are either of wrath or mercy; of wrath, Exodus 32:34 Leviticus 26:16 Jeremiah 15:3; of mercy, Jeremiah 29:10. It is plain that our Saviour useth the term here in the latter, not the former sense; and that by God's visitation of this people here, is meant his visiting them with his prophets, by John the Baptist, and by himself. Their not knowing of it (here intended) was their not making use of it, not receiving and embracing the gospel. The contempt of the gospel is the great, cause of all those miseries which come upon people in this life, or shall come upon them in that life which is to come.