Authors:

Love is the virtue of the Heart, Sincerity is the virtue of the Mind, Decision is the virtue of the Will, Courage is the virtue of the Spirit.

Frank Lloyd Wright, Patrick Joseph Meehan (1984). “The master architect: conversations with Frank Lloyd Wright”, Wiley-Interscience
Love is the virtue of the Heart, Sincerity is the virtue of the Mind, Decision is the virtue of the Will, Courage is the virtue of the Spirit.