I think that dreams are a most fascinating aspect of life. I have mentioned before that when my father Z”L was niftar that my mom (also Z”L a few months after him), my 2 brothers, my sister, and I all had the identical (not similar, mamesh identical, verbatim) dream about him when we all took Shabbos afternoon naps during the shiva week. We were all in our separate homes for Shabbos (I spent the Shabbos at my parents’ home with my mother), and we all dreamed the same precise scenario, same dialogue, same EVERYTHING, with only a slight exception. My dad appeared to each of us dressed differently,as he looked in a different stage of life. What he said to each of us though, was absolutely the identical script, something none of us could have known until we saw each other again after Shabbos, and in every case we were fully aware that we were asleep,that it was Shabbos, we were sitting shiva, and Dad was speaking to us to say good bye. The words and comments that he said were VERY specific, that he was very happy now, that he could not live in his body the way it was anymore, that he was with “Mama and Papa, and (named various relatives, including his two siblings),” and again reiterated how happy he was (he said it repeatedly) though he missed us and had to go.
When my siblings came back to the house after Shabbos and they and my mom and I compared notes, we were astonished at how accurately our comparisons matched. We were finishing each other’s sentences. All my life I have had the emunah in Olam Haba, unquestionably, but still it was emunah, not actual yediyah. Now, I feel my father O”H gave us that yediyah, and I thank Hashem every day for allowing us the nechama of that glimpse through my father’s petirah.