NEVER SAY, " NO ", NEVER SAY, " I CANNOT ", FOR YOU ARE INFINITE. YOU CAN DO ANYTHING AND EVERYTHING, YOU ARE ALMIGHTY

Teach men of the strength that is already within them. Instead of telling them they are sinners, the Vedanta takes the opposite position, and says, "You are pure and perfect, and what you call sin does not belong to you." Sins are very low degrees of Self-manifestation; manifest your Self in a high degree. That is the one thing to remember; all of us can do that. Never say, "No", never say, "I cannot", for you are infinite. Even time and space are as nothing compared with your nature. You can do anything and everything, you are almighty.

- Swami Vivekananda
The Complete Works of Swami Vivekananda/Volume 2/Practical Vedanta and other lectures/Practical Vedanta: Part I (Delivered in London, 10th November 1896)