Krishna strikes another note as a teacher of intense activity. Work, work, work day and night, says the Gita. You may ask, "Then, where is peace? If all through life I am to work like a cart-horse and die in harness, what am I here for?" Krishna says, "Yes, you will find peace. Flying from work is never the way to find peace." Throw off your duties if you can, and go to the top of a mountain; even there the mind is going — whirling, whirling, whirling. Someone asked a Sannyasin, "Sir, have you found a nice place? How many years have you been travelling in the Himalayas?" "For forty years," replied the Sannyasin. "There are many beautiful spots to select from, and to settle down in: why did you not do so?" "Because for these forty years my mind would not allow me to do so." We all say, "Let us find peace"; but the mind will not allow us to do so.
Therefore Krishna teaches us not to shirk our duties, but to take them up manfully, and not think of the result. The servant has no right to question. The soldier has no right to reason. Go forward, and do not pay too much attention to the nature of the work you have to do. Ask your mind if you are unselfish. If you are, never mind anything, nothing can resist you! Plunge in! Do the duty at hand. And when you have done this, by degrees you will realise the Truth: "Whosoever in the midst of intense activity finds intense peace, whosoever in the midst of the greatest peace finds the greatest activity, he is a Yogi, he is a great soul, he has arrived at perfection."
- Swami Vivekananda
The Complete Works of Swami Vivekananda/Volume 4/Lectures and Discourses/The Great Teachers of the World