Wisdom is the knowledge of how to best live one's life.

When I was a child I went to a Catholic school for many years. There we sang a hymn about the gifts of "wisdom, understanding, counsel and fortitude, knowledge and piety, fear of the Lord". One day the nun who was teaching us asked which of the gifts we wanted the most, and I said that I wanted wisdom. I thought that if I could get wisdom that it would lead to obtaining all of the other gifts, too.