The back of one door is the face of another. Pr.
The back-door robs the house. Pr.
The backslider in heart shall be filled with his own ways. Bible.
The bad fortune of the good turns their faces up to heaven; and the good fortune of the bad bows their heads down to the earth. Saadi.
The bad (böse) man has not only the good, but 45 also the bad against him. Bischer.
The barrenest of mortals is the sentimentalist. Carlyle.
The basest thought about man is that he has no spiritual nature; and the foolishest, that he has, or should have, no animal nature. Ruskin.
The basis of good manners is self-reliance. Emerson.
The battle of belief against unbelief is the never-ending battle. Carlyle.
The beams of joy are made hotter by reflection. Fuller.