Answer
Ptah-hotep's advice about truth was a crucial set of instructions that one must comprehend in order to gain wisdom.
Explanation
Ptah-hotep's advice about truth expands its horizons to explain the importance of how to gain wisdom. No man is born wise, but with time and efforts, one can truly comprehend how to escape from the maze of ignorance. Wisdom must be passed on, it must be taught with eloquence and depth and that man must learn it diligently.
