Leonard has had varied life experiences and learned much from judicious mentors. He volunteers with disadvantaged youth and is open to new adventures. Baltes and associates would say that Leonard displays:

Answer: wisdom

Explanation:

Psychologists explains wisdom as the combination of one's experiences, knowledge and deep understanding of how the world operates and the ability to handle the ups and down of life with all its challenging uncertainty.

It makes a person optimistic about life and be able to tackle life situations in a calm manner. This is a person who has learned a great deal in life through personal experiences and through interacting with the great influential people.