Be, therefore, busy to get humility, and hold it fast, for it is the first and the last of all other virtues. The first, as being the foundation, as saith St Augustine: "If thou think to build a high house of virtues, lay first a deep foundation of humility." Also, it is the last; for it is the maintainer and conserver of all other virtues. St Gregory saith: "He that gathereth (or striveth to keep) virtues without humility, is like him that maketh or carrieth the powder of spices in the wind. Do thou never so good deeds, fast, watch, or anything else, if thou hast not humility, it is naught which thou dost." (John Climacus)

To be humble is mostly to listen.

To be humble is to refrain from judging others.

To be humble is to know one's self in relationship to God and neighbor.

To be humble is to seek God's purpose.

To be humble is to actively serve God's purpose.

The image is Humility against Pride from the Rondeaux des Vertus.