When we in prayer seek only the glorification of the name of God, then we are in complete harmony with the spirit of prayer. Then our hearts are at rest both while we pray and after we have prayed. Then we can wait for the Lord.
God alone fully understands what each one of us needs; we make mistakes continually and pray for things which would be harmful to us if we received them. Afterwards we see our mistakes and realize that God is good and wise in not giving us these things, even though we plead ever so earnestly for them.