• to be in right, to be in the right
• to play a square game, to play the game
• to be impulsive in one's actions
• to act for the best, to do sg in all good faith
• to act in unison with sy
• to square one's practice with one's principles
• to act up to one's principles
• to cast one's bread upon the waters
• to mind one's p's and q's
• to mind one's p's and q's
• to suit the action to the word