This phrase warns that not everything that looks valuable or attractive is actually so, originating from The Merchant of Venice.
Meaning to initiate conversation in a social setting, this expression comes from The Taming of the Shrew.
Used to express that something is incomprehensible, this quote is from Julius Caesar.
Referring to someone with a kind and generous nature, this phrase appears in Henry V.
This saying suggests that excess can be detrimental, originating from As You Like It.
Indicating something of utmost importance, this phrase is found in Macbeth.
This means to keep silent about something, and it originates from Henry VI.