"And it came to pass at that time that Judah went down" (Genesis 38:1). The rabbis heard in "went down" more than geography. Judah left his brothers, married a Canaanite woman, and began a sequence of events that included the death of two sons, the seduction of his daughter-in-law Tamar, and the near-execution of the woman carrying his own twins. The going-down was moral as much as spatial.
God speaks through Micah: "Even though I made a covenant with your father Abraham and told him to 'Arise, walk through the land' (Genesis 13:17)... and I brought you into a land of fruitful fields... you have defiled my land and made my heritage an abomination" (Jeremiah 2:7). The covenant was kept. The gift was given. The land was entered. And still, the covenant's terms were violated. The "going down" is the pattern — every gift of the covenant is followed by a potential descent, a test of whether the gift will be received with gratitude or taken for granted.
But Judah's story does not end in the descent. It ends with him standing before Joseph in Egypt and offering himself as a slave in place of Benjamin. The man who had sold his brother into slavery was now offering his own freedom for his brother. The rabbis read the entire trajectory — down from his brothers, down into the morally compromised Adullamite marriage, and then slowly back up toward the man who would become the ancestor of David and the messianic line — as the Torah's model of teshuvah, of return. You can go down. The question is whether you come back up.