He who gives man spiritual knowledge is the greatest benefactor of mankind and as such we always find that those were the most powerful of men who helped man in his spiritual needs, because spirituality is the true basis of all our activities in life. A spiritually strong and sound man will be strong in every other respect, if he so wishes. Until there is spiritual strength in man even physical needs cannot be well satisfied. Next to spiritual comes intellectual help. The gift of knowledge is a far higher gift than that of food and clothes; it is even higher than giving life to a man, because the real life of man consists of knowledge. Ignorance is death, knowledge is life. Life is of very little value, if it is a life in the dark, groping through ignorance and misery.
- Swami Vivekananda
The Complete Works of Swami Vivekananda/Volume 1/Karma-Yoga/The Secret of Work