This Apprentice of mine, after all, he has fairly learned the Art; and will continue it when I am gone!"-- Yes, your Majesty, it is a Prince-Royal wise to recognize your Majesty's rough wisdom, on all manner of points; will not be a Devil's-FRIEND, I think, any more than your Majesty was.

Here truly are rare talents; like your Majesty and unlike;--and has a steady swiftness in him, as of an eagle, over and above! Such powers of practical judgment, of skilful action, are rare in one's twenty-third year.

And still rarer, have readers noted what a power of holding his peace this young man has?
Fruit of his sufferings, of the hard life he has had.

Most important power; under which all other useful ones will more and more ripen for him.

This Prince already knows his own mind, on a good many points; privately, amid the world's vague clamor jargoning round him to no purpose, he is capable of having HIS mind made up into definite Yes and No,--so as will surprise us one day.
Friedrich Wilhelm, we perceive, [His Letter, 24th October, 1735.