This excerpt from Jeff Keller's book, "Attitude is Everything," details his personal journey from a dissatisfied lawyer to a motivational speaker. He champions the power of positive thinking, highlighting how altering one's mindset can transform one's life. The book provides practical strategies for cultivating a positive attitude through thought, speech, and action, illustrated with anecdotes and advice from various motivational figures. It emphasizes the importance of commitment, overcoming adversity, and surrounding oneself with positive influences. Keller uses the metaphor of a "mental window" to represent one's attitude, advocating for keeping it clean to see the world clearly and achieve one's potential.