Be calm n balanced

Swami Vivekananda says :

I have been asked many times how we can work if we do not have the passion which we generally feel for work. I also thought in that way years ago, but as I am growing older, getting more experience, I find it is not true. The less passion there is, the better we work. The calmer we are, the better for us, and the more the amount of work we can do. When we let loose our feelings, we waste so much energy, shatter our nerves, disturb our minds, and accomplish very little work. The energy which ought to have gone out as work is spent as mere feeling, which counts for nothing. It is only when the mind is very calm and collected that the whole of its energy is spent in doing good work. And if you read the lives of the great workers which the world has produced, you will find that they were wonderfully calm men. Nothing, as it were, could throw them off their balance. That is why the man who becomes angry never does a great amount of work, and the man whom nothing can make angry accomplishes so much. The man who gives way to anger, or hatred, or any other passion, cannot work; he only breaks himself to pieces, and does nothing practical. It is the calm, forgiving, equable, well-balanced mind that does the greatest amount of work. ( II -293)