Final answer:
The quote "Give every man thy ear, but few thy voice" is from Shakespeare's play Hamlet, spoken by the character Polonius to his son.
Step-by-step explanation:
The counsel, "Give every man thy ear, but few thy voice," is from the play Hamlet by William Shakespeare. This advice comes from a character named Polonius, who gives his son Laertes guidance before Laertes returns to France.
This quote is part of a larger speech where Polonius offers a collection of wisdom about how to behave and interact with others in the world, emphasizing the importance of listening over speaking and suggesting a careful approach to sharing one's own opinions.