Helping others physically, by removing their physical needs, is indeed great, but the help is great according as the need is greater and according as the help is far reaching. If a man's wants can be removed for an hour, it is helping him indeed; if his wants can be removed for a year, it will be more help to... him; but if his wants can be removed for ever, it is surely the greatest help that can be given him. Spiritual knowledge is the only thing that can destroy our miseries for ever; any other knowledge satisfies wants only for a time. It is only with the knowledge of the spirit that the faculty of want is annihilated for ever; so helping man spiritually is the highest help that can be given to him. 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.
- Swami Vivekananda
The Complete Works of Swami Vivekananda/Volume 1/Karma-Yoga/The Secret of Work