Knowledge becomes wisdom only after it has been put to good use.
Information is useless if it is not applied to something important or if you will forget it before you have a chance to apply it.
You must bring out of each word its practical cash-value, set it at work within the stream of your experience.
Once innocence--an all too-brief state of being, if such a one exists--encounters experience, it is transformed. If that transformation is understood, it becomes knowledge. And if that knowledge is employed, then it becomes wisdom.
Wisdom and knowledge can best be understood together. Knowledge is learning, the power of the mind to understand and describe the universe. Wisdom is knowing how to apply knowledge and how not to apply it. Knowledge is knowing what to say; wisdom is knowing whether or not to say it. Knowledge gives answers; wisdom asks questions. Knowledge can be taught, wisdom grows from experience.
And tell him it's quite true that the best of the philosophers are of no use to their fellows; but that he should blame, not the philosophers, but those who fail to make use of them.
