At the beginning of the fifth aliyah are the words "what does Hashem require of you but to fear the L-rd your G-d", and Rashi says that from these words the Talmud (Tractate Berachos 33) concludes that "Everything is in the hands of Heaven except for the fear of Heaven". Another way to put this is that everything is Divine Providence, except for our fear of G-d in our choice to do mitzvahs or averahs (sins). In the rest of this aliyah, Moshe Rabeinu expounds on G-d's greatness and tells the Jewish people to love and fear G-d. It is explained in Chassidus, that when we contemplate G-d's greatness we develop our love and fear of G-d.