Wikipedia
Magis
Magis (pronounced "màh-gis") is a Latin word that means "more" or "better." It is related to Ad majorem Dei gloriam, a Latin phrase meaning "for the greater glory of God." Magis refers to the philosophy of doing more, for Christ, and therefore doing more for others. It is an expression of an aspiration and inspiration. It relates to forming the ideal society centered on Jesus Christ.
The roots of the phrase are ascribed to St. Ignatius's exercise of doing more for God. He would encourage people around him during his time by asking: "What have I done for God? What am I doing for God? and What MORE can I do for Him?"