"One year, most of Adar went by and it didn't rain. They sent for Choni the Circle Maker. He prayed and the rains didn't come. He drew a circle, stood in it and said: 'Master of The World! Your children have turned to me; I swear in Your great name that I won't move from here until You have pity on Your children.' The rains came down." (Talmud, Taanit 23a)
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Choni the Circle-Maker
Adar 20 is the yahrtzeit (anniversary of the passing) of Rabbi Yoel Sirkes (1560?-1640), Rabbi of Krakow and author of the Bayit Chadash ("Bach") commentary on the great Halachic work, the Arba'ah Turim.
Afterlife is a very rational, natural consequence of the order of things.
After all, nothing is ever lost—even the body only transforms into earth. But nothing is lost.
So too, the person you are is never lost. That person—that soul—only returns to its origin.
If your soul became acutely attached to the material world during its stay here, then it must painfully rip itself away to make the journey back.
But if it was only a traveler, connected to its source all along, then its ride home is heavenly.