When God gave the law at Mount Sinai, the mountain trembled in God's presence. Even with our great technology, the seas, rivers, and mountains still present us with formidable challenges. But to God, who controls nature, they are as nothing. When observing the power of an ocean wave or the majesty of a mountain peak, think of God's greatness and glory, which are far more awesome than the natural wonders you can see. To tremble at God's presence means to recognize God's complete power and authority and our frailty by comparison.