No One Can Guess from Where His Sustenance Will Come

Reb Simcha Bunim of Peshis’cha explains that at the Yam Suf, every person probably imagined how Hashem would save them, but none of them imagined that the sea would split and turn into dry land! Hashem saved them specifically in a way that they could not have imagined. This is how Hashem provides a person with parnassah as well, in ways he could not have dreamed of.

(Yismach Yisrael, Chol Hamoed Pesach)