Calmness

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. 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.
- Swami Vivekanand