Paradise Lost (book IV) – Gabriel to Satan

Satan, I know thy strength, and thou knowest mine;
Neither our own, but given: What folly then
To boast what arms can do? since thine no more
Than Heaven permits, nor mine, though doubled now
To trample thee as mire: For proof look up,
And read thy lot in yon celestial sign;
Where thou art weighed, and shown how light, how weak,
If thou resist. The Fiend looked up, and knew
His mounted scale aloft: Nor more; but fled
Murmuring, and with him fled the shades of night.