There are various segulot found in Chazal , some which promise wealth, some marriage, some children. If a person follows exactly what he was told to do but does not see the outcome that he was told he would get, it could severely damage that person’s emunah. The same applies when people go to rabbis for berachot and the rabbi tells them, If you do this, you will get married by this date, or you will have a child by this date. If it doesn’t happen, the person’s emunat chachamim gets damaged. The Gemara tells us that even a Tanna , Elisha ben Avuya went off the derech because his emunah in the Torah became shattered when what he saw didn’t seem to match up with what it said. The Torah says for doing the mitzvah of kibud av v’em one of the rewards is long life and the same applies to the mitzvah of shiluach haken . Elisha once saw a boy who was told by his father to climb a tree and sent away the mother bird, and he fell and died. He did both mitzvot that promised long life and he died young. This caused Elisha to go off the path. The Gemara says, if he would have understood the pasuk properly, he would not have gone astray. The reward referred to in those mitzvot of long life is speaking about life in the Next World. The Rambam wrote in a letter to his son that if he ever comes across a pasuk or a Chazal that he doesn’t understand, he should attribute the lack of understanding to his own shortcomings. He should leave the question on the side and, one day, he will get an answer. The Shulchan Aruch writes in siman 118 that washing netilat yadayim for bread with a lot of water is a segula which brings a person wealth. The Mishna Berura there writes, if somebody is careful to always wash with a lot of water but did not become wealthy as a result, it is because that person has other deeds which he did that are blocking the parnasa from coming. Washing with a lot of water does bring wealth, but that is assuming the person didn’t do an averah that blocks the wealth. The Mizmor L’Asaf writes, the same applies the other way. If a person did an averah whose negative effect is to lose parnasa , if he has certain merits, they can prevent the parnasa from being lost for the time being. The Gemara says, someone who prays the Amida at sunrise will not get damaged that day. The Mishna Berura says something similar about a person who is סומך גאולה לתפילה . Rav Chaim Kanievsky, zatzal , said the same applies to those guarantees. They are assuming the person did not do an averah that would require him to get damaged. If somebody followed a segula of Chazal and did not get the reward he was looking for, it is not because the segula didn’t work. Rather, it is because of other deeds that he did that he needs to make teshuva for first. And therefore, he should not lose faith in the promises of Chazal but improve his ways and continue doing the segulot . The Chatam Sofer in his Teshuvot in siman 158 writes, regarding the segula of being a sandak making a person wealthy, it is one hundred percent true. However, it is also possible that the person may have done sins which block that parnasa from coming. The same applies as well when a rabbi gives a beracha . The rabbi has power, but there could be other factors that are holding back the coming to fruition what the rabbi said. Every word in the Torah is emmet , every word of Chazal is emmet . We should never allow an experience to cause our emunah to waver even in the slightest bit. There is an answer to every question and if we don’t know it yet, we should leave the question on the side and continue doing our avodah knowing that one day we will get the answer and the answer will be so clear to us that we won’t even believe that we ever had the question in the first place.