Your knowledge and wisdom are real and true if you are able to practically and consciously manifest them in your daily existence. To be truly wise is to be living in concious awareness of the reality of love and light here-now. Past experiences of fear no longer condition you and your inner freedom is refected in the fluidity and harmony of your movements in your self and in life.
For as long as knowledge and wisdom remain theoretical, they are only masks you wear and fear is what you actually know and live by.