The psalmist had been weaned, or stripped, of everything except the Lord (cf. Psa. 73). When we have become like the psalmist, humble, calm, quiet, and weaned, we can advise others to hope in God (v. 3).
Psalm 131 is the praise of a saint, in his going up to Zion, concerning his humbled heart and quieted soul (v. 2) before Jehovah. This was a result of God’s forgiveness and redemption mentioned in Psa. 130.
This is how denominations are formed. The main direction is to come out of the system; it cannot change. "I began to realize that our practices have differed and deviated from our vision. Our vision was the same, our teaching was mostly the same, the truth is always the same, but our practice has really differed."