What actually constitutes wisdom?

What actually constitutes wisdom? Spiritual science has always maintained that human wisdom has something to do with experience, and that painful experience. He who is actually in the throes of suffering manifests in this suffering something that is an inward lack of harmony. He, however, who has overcome the pain and suffering and bears their fruits within him, will always tell you that through suffering he has gained some measure of wisdom. He says: — “the joys and pleasures of life, all that life can offer me in the way of satisfaction, all these things do I receive gratefully; yet were I far more loath to part with my pain and suffering than with those pleasant gifts of life, for ‘it is to my pain and suffering that I owe my wisdom.’ ”

Source: Rudolf Steiner – GA 55 – Occult Significance of Blood/An Esoteric StudyBerlin, October 25, 1906