Upon returning from his first meeting with a Hasidic master, the great sage R. Levi Yitzchak of Berditchev was asked what he'd learned. He replied: I learned there's a Creator. What does this mean?The verse says: And this day you shall know and take to your heart that the LORD, He is God in the heavens above and on the earth below, there is none else. Just as a person is certain when it is the day time, and when it is the night time, with the same clarity one can know that there is a Creator.