Ps 131 My heart is not proud, O LORD, my eyes are not haughty; I do not concern myself with great matters or things too wonderful for me.2 But I have stilled (Greek word meaning to adjust, to yield, to compose) and quietened (Greek word same as in Ps 37 – to be silent, to tarry, to wait, to rest) my soul; like a weaned child with its mother, like a weaned child is my soul within me. Here it is the heart which is silent and still – at rest with God like a child in its mother’s arms.
The stillness of heart is letting go of all your pride, roles, jobs, expectations, and self-worth and being a child His arms. It is tied to physical stillness and silence.
Why is the stillness of the heart so important? The word for “know” in Ps 46:10 means to recognize, to be acquainted with a familiar friend. It refers to a relationship. The route to knowing God is resting prayer and the route of resting prayers runs from activity to inactivity to abiding. In this still place, it is easier to perceive God’s thoughts.