flesh, and He commands him to build a Teivah and bring into it two of every living creature — male and female — in order to preserve life and allow the world to continue after the mabul.

The Torah describes the size of the Teivah: three hundred amot in length, fifty amot in width, and thirty amot in height, and it had three levels.

The Rishonim ask:
How could all the animals — including huge ones like elephants and re’eim — possibly fit into such a Teivah, along with enough food for an entire year?

They answer that it was a nes — a miracle — that everything fit and was sustained inside the Teivah.

But Rabbeinu Bachya raises a strong question:
If HaKadosh Baruch Hu already performed a nes that all the animals and food fit inside the Teivah, why didn’t He make a simpler nes — that Noach and the animals should survive the mabul without needing a Teivah at all?

Rabbeinu Bachya explains that the Torah is teaching us a deep hashkafah for life:
Even when something seems completely beyond reason, a person must still make his proper hishtadlus. Only after a person does all he can, does HaKadosh Baruch Hu complete the rest through nes.

Noach didn’t wait for salvation to fall from Shamayim — he built the Teivah, he acted, he did his part — and then HaKadosh Baruch Hu brought the nes.

So too in our own lives: even when things look impossible, our job is to act, to do our hishtadlus with faith. Once we do what we can — HaKadosh Baruch Hu does the rest.