"Be still and know I am God" is a phrase that comes from the Bible, specifically from Psalm 46:10. It is often interpreted as an invitation to find peace and calmness in the presence of God. The full verse reads, "Be still and know that I am God; I will be exalted among the nations, I will be exalted in the earth." 

The phrase encourages believers to stop worrying, cease striving, and find rest in the knowledge that God is in control. It reminds us that even in the midst of chaos, God is sovereign and powerful, and we can trust in him to provide for their needs and guide them through difficult times. 

The verse is often used as a source of comfort and strength in times of stress or uncertainty, encouraging us to take a moment to quiet our minds and focus on God's presence and power. It is also sometimes used as a reminder to be humble and acknowledge God's greatness and authority.