Inquisitive

Definitions: (1) seeking knowledge by discussion, investigation, or observation; (2) given to research; (3) eager for information and understanding; curious

Compatible Quality: informative

Too Far: busybody

Quote:
• There’s nothing that can help you understand your beliefs more than trying to explain them to an inquisitive child. — Frank A. Clark (1911–1991) American cartoonist
• Every art and every inquiry, and similarly every action and choice, is thought to aim at some good; and for this reason the good has rightly been declared to be that at which all things aim. — Aristotle (384-322 BC) Greek philosopher

Symbol: the question mark (?)