By listening, playing, and reading. In this case there's a pedal point in the bass-- that is, it just keeps repeating the same note as the harmonies above it c

By listening, playing, and reading. In this case there's a pedal point in the bass-- that is, it just keeps repeating the same note as the harmonies above it change. So when that bass finally begins to move and then anchors a fifth above for the next phrase of music, it's about as aurally striking as music can get.