Books are key to knowledge.

Meaning: This means that books are the way to get knowledge and learn about the world.

Choice of Words: A key is something that opens something else. Knowledge is information and understanding about a subject. When you put them together, "Books are key to knowledge" means that books can open the door to learning and understanding.

Alternative Expressions

Related Expressions

• Reading is a key to unlocking knowledge and understanding.
• Knowledge is the key to success.
• Reading is a key to unlock knowledge.
• Reading is a key to knowledge.
• Student's curiosity, knowledge's key.
• Knowledge became key to her success.
• Knowledge is power and reading gives knowledge.
• Books are a treasure trove of knowledge.
• We read books for knowledge.
• Writers wrote books for knowledge.