Vivekananda's Quotes 

Go on bravely. Do not expect success in a day or a year. Always hold on to the highest. Be steady. Avoid jealousy and selfishness. Be obedient and eternally faithful to the cause of truth, humanity, and your country, and you will move the world. Remember, it is the person, the life, which is the secret of power--nothing else. Keep this letter and read the last lines whenever you feel worried or jealous. Jealousy is the bane of all slaves. It is the bane of our nation. Avoid that always.

Letter to Dr. Nanjunda Rao. From New York: 

April 14, 1896. Complete Works, 5.108.