Amidst a profound questioning about the secrets of creation, a striking picture emerges of divine control over the raw forces of nature. The immense power of the sea requires a supreme force to hold it back and protect the dry land. To prevent the waters from flooding the entire world, a firm boundary was established. The natural barrier that locks the sea in place, acting like heavy, closing doors, is simply the sand along the shore [רש״י, מצודת דוד].
This containment is not merely a geographic fact, but an ongoing miracle. By its very nature, water tends to spread and cover the earth, and the sea itself is actually positioned higher than the dry land. The fact that crashing waves do not wash away the world is the result of a continuous divine decree that overrides the natural order. God maintains this delicate balance to allow the world to exist and to instill a sense of awe within humanity [רמב״ן, אלשיך, מצודת דוד].
The emergence of the sea is depicted through the vivid imagery of childbirth. The water bursts forth and flows outward [רש״י, מצודת ציון, אבן עזרא], recalling the bending and physical strain of a mother in labor [מלבי״ם]. In this metaphor, the deep abyss serves as the womb from which the waters are born [רש״י, רמב״ן, מצודת דוד, אלשיך]. Just as a newborn enters the world, the sea emerged from the depths during the time of creation. From that very moment of birth, God etched clear, uncrossable borders for it [ביאור שטיינזלץ, רלב״ג, מלבי״ם].
While the primary approach views this as a specific historical moment during creation, an alternative perspective understands it as a cyclical natural phenomenon. The imagery of moving in and out of the womb describes the daily rhythm of high and low tides, resembling a developing child shifting at the edge of the womb before birth. Expanding on this theme, another interpretation suggests that the vast ocean surrounding the globe acts as a universal mother and womb, giving birth to all the other seas and rivers that flow across the earth [תקות אנוש].