Ahl HaGeula v’ahl HaTemura #86:
It is one of the kindnesses of G‑d that He hasn’t tested us with tests that are so severe because there have not yet been open miracles. All their publicity and stories about their miracles are only false illusions that blind the eyes. Satan has been satisfied with that which the religious Jews who are attracted to Zionism have described as miracles. This has been enough to blind the eyes of a generation as weak and lowly generation as ours. However I am still afraid of what will happen in the future. I hope that it won’t come to this and that we won’t be tested from Heaven with different and powerful tests… In general a person needs to know that he should not be excited and impressed with any miracle or sign and wonder or success of the wicked or their ilk. That is because all of them are only tests from Satan…