What we are to understand is this, that what we call mistakes or evil, we commit because we are weak, and we are weak because we are ignorant. I prefer to call them mistakes. The word sin, although originally a very good word, has got a certain flavour about it that fright...ens me. Who makes us ignorant? We ourselves. We put our hands over our eyes and weep that it is dark. Take the hands away and there is light; the light exists always for us, the self-effulgent nature of the human soul. Do you not hear what your modern scientific men say? What is the cause of evolution? Desire. The animal wants to do something, but does not find the environment favourable, and therefore develops a new body. Who develops it? The animal itself, its will. You have developed from the lowest amoeba. Continue to exercise your will and it will take you higher still. The will is almighty. If it is almighty, you may say, why cannot I do everything? But you are thinking only of your little self. Look back on yourselves from the state of the amoeba to the human being; who made all that? Your own will. Can you deny then that it is almighty? That which has made you come up so high can make you go higher still. What you want is character, strengthening of the will.
- Swami Vivekananda
The Complete Works of Swami Vivekananda/Volume 2/Practical Vedanta and other lectures/Practical Vedanta: Part IV