Pieces of worthless glass, in splendid settings, look like gems; in the company of the wise, a fool may pass for wise. Does not the dog look like a king when he has ascended a royal conveyance?

...man looketh on the outward appearance, but the Lord looketh on the heart.

God Almighty never created a man half as wise as he looks.

Habit maketh no monk, ne wearing of gilt spurs maketh no knight.

Be and not seem.

Things are seldom what they seem, Skim milk masquerades as cream.

No man, for any considerable period, can wear one face to himself, and another to the multitude, without finally getting bewildered as to which may be the true.

The world more frequently recompenses the appearance of merit, than merit itself.

Be content to seem what you really are.

All that glitters is sold as gold.