The greatest miracle in the Torah is Manna from heaven. You may think that the exodus was greater, but that was one event limited by time. You may think that the Ten Commandments were the greatest miracle, but that happened but twice, and did not repeat. The miracle of Manna happened every day for forty years. The people, who could have starved without the Manna, always had sufficient food to eat. Those people also doubted God's presence continually.
Miracles do not create faith. We team to live with them and not recognize them. In like manner, the poor learn to live in ghettoes, the sick learn to live with disability, and the rich learn to live with wealth. Circumstances of life never have created faith. With all of its wealth, America is in spiritual turmoil today. Germany during world World War II, with all of its great scholarship, was unable to comprehend the Judeo Christian ethic that has existed for almost four thousand years.
Miracles do not create faith rather, faith is the result of a concentrated effort to find God in good deeds. Sometimes, in the midst of poverty when we try to feed the hungry we find God. Other times at a slot machine in Atlantic City, we lose sight of godliness and ultimately lose our faith.
Jews believe that by the acts that they do, they discover faith. By the acts that we do we can find God.
Once the Kotzker Rebbe was asked where God could be found. He replied "Wherever man lets Him in."