דברים ל:א פירוש: רמב״ן, ספורנו, אור החיים וRav Hirsch

AND IT SHALL COME TO PASS, WHEN ALL THESE THINGS ARE COME UPON THEE. I have already mentioned⁴⁷See Leviticus 26:12, and above, 4:25; 19:8. that this chapter refers to the future, for all its subjects have not happened and have not been created, but they are destined to take place.

והשבות אל לבבך, you will be able to distinguish the truth between apparently contradictory phenomena. When you become the victim of what has been predicted for the sinners, you will realise how far you had strayed from G’d’s Torah, i.e. from G’d Himself.

והיה כי יבאו עליך כל הדברים, "It will be when all these things will come upon you, etc." Why did the Torah speak about "all these things," instead of merely writing: "when the blessing or curse will come upon you?" ...