Why Do They Nod While Praying

Q. Why do Orthodox Jews nod when they pray at the wailing wall or reading the scripture?

A. Some say this ancient tradition comes from Psalm 35:10 which reads, My whole being will exclaim, “Who is like you O Lord?” Others  point to an interpretation of Proverbs  20:27 that the soul of man is God’s candle. They say swaying back and forth while praying represents a candle’s flame that flickers back and forth while burning.