Divine mercy and forgiveness are defined by a profound act of separation: God removes a person's sins so completely that those past actions no longer define who they are. He clears away wrongdoings, ensuring they are never held against us [ביאור שטיינזלץ], and pardons them one after another [מצודת דוד]. This process is not a single, isolated event. Rather, it is a continuous kindness that God performs over and over again, every time a person turns back to Him in repentance [אבן עזרא].
The vast distance between the east and the west serves to illustrate the absolute extreme to which God removes these sins. Commentators explore why this specific horizontal axis is chosen to represent this distance, rather than the north and the south. From a geographical perspective, the east and west mark the outer limits of the habitable world where human beings can travel freely, whereas movement to the extreme north or south is blocked by severe cold or heat [רד״ק].
Viewed through the lens of time, the journey from east to west mirrors the path of the sun from sunrise to sunset. This daily cycle corresponds to the twelve daylight hours of the Day of Atonement. It is during this exact window of time that God actively removes and conceals the accusing angels brought into existence by our wrongdoings [אלשיך].
On a deeper level, the sun's path from east to west serves as a metaphor for human nature. The sun's daily movement across the sky is rapid and forced by external forces, contrasting with its slow, independent yearly orbit. The human soul operates in a very similar way. A person's natural, independent progress toward spiritual wholeness and closeness to God is often slow and heavy. In contrast, the pull toward sin is fueled by the fast, overpowering, and forced urges of the evil inclination. Because God understands that these sins are the result of external pressures rather than a reflection of a person's true, inner essence, He treats us with forgiveness and pushes those sins far away [מלבי״ם].
Ultimately, this immeasurable distance teaches that God does not punish us for even a tiny fraction of what strict justice might demand. Instead, He responds with overwhelming mercy, acting with the deep compassion of a father caring for his children [מאירי].