Swami Vivekananda discusses the importance of faith and strength. He says that faith in oneself is key to unlocking one's divinity and infinite power. Those who have lost faith in themselves are atheists. He emphasizes that we must have faith in ourselves and never think that we are weak or incapable. Our thoughts shape our reality, so we must think of ourselves as strong. With perseverance, willpower and hard work, we can achieve our goals and revolutionize the world. Strength is life while weakness is death.