1. The greatest danger in life is an empty heart. ——Glaude

2. The heaviest burden in life is not work, but boredom. ——Romain Rolland

3. When encountering major worries and troubles in life, friendship should be an effective comfort. ——Balzac

4. Life without books is like a life without sunshine; life without books is like a bird without wings. ——Shakespeare

5. People who have no ideals in life are poor people. ——Turgenev