In Deuteronomy 28, the phrase, “It shall come to pass” is repeated twice. “Now it shall come to pass, if you diligently obey the voice of the Lord your God, to observe carefully all His commandments which I command you today, that the Lord your God will set you high above all nations of the earth” (Deuteronomy 28:1). God clearly states that if you obey His commands then all of these blessings will come to pass.
But God also states in Deuteronomy 28:15, “But it shall come to pass, if you do not obey the voice of the Lord your God, to observe carefully all His commandments and His statutes which I command you today, that all these curses will come upon you and overtake you…”
A lot of the times we are afraid of the outcome of circumstances. If we don't obey or heed God's voice, then we are following our own voice. We fear God, but we also fear man. Proverbs 29:25 states, “The fear of man brings a snare, but whoever trusts in the Lord shall be safe.”
In Matthew Henry’s Concise Commentary, he states, “The blessings are here put before the curses. God is slow to anger, but swift to show mercy. It is his delight to bless. It is better that we should be drawn to what is good by a child-like hope of God's favor, than that we be frightened to it by a slavish fear of his wrath” (Nehemiah 9:17)