All those docile, tame animals are "in" (cows, sheep, ducks, goldfish, etc.), whereas all those strong, tough ones (lions, bears, sharks, eagles, etc.) are "out"—the one that feels like he doesn't know whether he is coming or going has one big advantage: He is forced to rely on Hashem! The "solid" guy that has it all "figured out" might not feel like he needs Hashem so much, whereas the one that may feel "alone in the world" is actually quite like Hashem Himself, so-to-speak, who is also "One", l'havdil, (but in case you do have it all "figured-out", that’s okay too...like the shevatim that are represented by tough animals like lions and snakes, and unlike the gods of the Egyptians and others that were docile like sheep). The medrish says that the malach Gavriel wanted to save Avraham Avinu a"h from the kivshan ha'eish (fiery furnace), but Hashem didn't let: "Avraham is 'one' in the world and I am 'One', so it is only right that 'One' should save 'one'." The truth is that all of our "problems" come from a lack in emuna and from reliance on other powers aside from Hashem (see Chovos haLevavos beginning of Sha'ar haBitachon)—so it is poshut practical to invest oneself in inyanei emuna and bitachon, into really living with Hashem, for the pay-off is endless, both in This World and the Next. It is mamesh like kishuf ("sorcery"), l'havdil, and a person merits to great miracles and salvations in all areas. In place of all the headaches and worries that may come in This World, with a hearty daily investment in emuna and bitachon, little by little one's life turns around completely, with nissim and niflaos just pouring in, with the help of Hashem.
Story:
Beryl* was all depressed—he was feeling so "stuck" in teva (laws of nature), and felt "held back" in so many areas...until he stumbled upon a Chovos haLevavos: Shaar haBitachon (and Madreigas ha'Adam as well). Beryl was blown away with from the true greatness of Hashem, and how it is so available for anyone who wants to tap-in. He got to work, and before he knew it he became a great "kishuf-macher", not with sorcery and witchcraft, chas v'shalom, but rather l'havdil just with Hashem Himself! A m'kurav l'malchus! (Close to the King). This is something that is available to everybody, and it is in fact the biggest mitzva—making Hashem "real"!