Wisdom?

We have variant definitions of data, of information, of knowledge. What of wisdom? Here is one definition:

“Wisdom is a practice that reflects the developmental process by which individuals increase in self-knowledge, self-integration, nonattachment, self-transcendence, and compassion, as well as a deeper understanding of life. This practice involves better self regulation and ethical choices, resulting in greater good for oneself and others.”

Lots of flowery language that empiricists would balk at. It is difficult to measure concepts like self-knowledge and self-transcendence, even if they could be defined properly. They mean different things depending on how one thinks of the world—as divinely created or guided, as physics, as ultimately ineffable—so where does one begin the search for wisdom or an understanding of wisdom?