He who knows all the answers has not been asked all the questions.

The saying underscores intellectual humility: any claim to complete knowledge is suspect because the world’s complexity always exceeds what one person has encountered. It suggests that wisdom lies less in possessing fixed answers than in remaining open to further inquiry, new perspectives, and better questions. The line also implies that learning is relational and situational—what you “know” depends on what you have been challenged with. In practice, it cautions against dogmatism and encourages curiosity, dialogue, and the recognition that certainty can be a sign of limited experience rather than mastery.