Fortiter in re, Suaviter in modo

"Fortiter in re, Suaviter in modo", which means "vigorous in deed, gentle in manner", is an excellent motto.  It is associated with the fifth Superior General of the Society of Jesus, Claudio Acquaviva.

Ad maiorem dei gloriam

"Ad maiorem dei gloriam" is the motto of the Society of Jesus, better known as the Jesuits.  It translates as: "To the greater glory of God".  As an English speaker I have a strong urge to amend the word order to: "Ad maiorem gloriam dei".