Vince malum bono

Vince malum bono or Vince in bono malum is a Latin phrase meaning Overcome evil with good or Defeat Evil with Good.
The motto comes from partial quotation from the Bible, Saint Paul's Epistle to the Romans, : "Do not be overcome by evil, but overcome evil with good".
The phrase is used as a motto at a number of institutions:

Anahuac Universities Network
Bishop Cotton School, Shimla
Old Swinford Hospital
St. Paul's Senior High School, Denu, Ghana (formerly St. Paul's Secondary School)
Catholic Memorial School
Inscription above entrance to Florentine Hotel, Sheffield