Blessed are the poor in spirit
Matthew 5:3 (ASV 1901)
3Blessed are the poor in spirit: for theirs is the kingdom of heaven.
Luke 6:20 (ASV 1901)
20And he lifted up his eyes on his disciples, and said, Blessed are ye poor: for yours is the kingdom of God.
Young George Müller experienced first hand the blessing of being humble in his preaching.