When two persons do the self-same thing, it oftentimes falls out that in the one it is criminal, in the other it is not so; not that the thing itself is different, but he who does it.
Duo quum idem faciunt, sæpe ut possis dicere,
Hoc licet impune facere huic, illi non licet:
Non quod dissimilis res sit, sed quod is sit.
Hoc licet impune facere huic, illi non licet:
Non quod dissimilis res sit, sed quod is sit.
Original text (Latin)