Quote by Theodore Roosevelt: “With self‑discipline, all things are possible.”

This quote emphasizes that internal control and perseverance are key to achieving any goal. It suggests that by mastering oneself and maintaining focus, individuals can overcome obstacles and unlock their full potential, making seemingly impossible feats attainable.

From his autobiography, reflecting on his early life and struggles with physical weakness. Roosevelt, who overcame childhood asthma and poor eyesight through sheer will, believed in the power of individual effort and disciplined self-improvement to shape one's destiny.

American politician, statesman, soldier, conservationist, naturalist, historian, and writer who served as the 26th president of the United States from 1901 to 1909.