Probably the most incredible thing that happened during Krias Yam Suf, was not the miraculous splitting of the sea or the drowning of the Egyptian army, or the salvation of the Jewish people. But rather when all of Klal Yisroel lifted up their voices and sang in unison as one choir.
Every individual was able to make the following declaration: Zeh K-e-li Ve-anvehu: This is my God and I will glorify Him.
They came to recognize not only that there is a God and He does good and miraculous things for us. But rather this is my God and He does good for me.
The big prize of life is not to discover that there is a God and he does good, but rather that this is my God.