Swami Vivekananda was probably one of the most articulate realized-souls ever to be born. Apart from various topics, he specifically focused on the importance of giving. Giving as a virtue, and giving as a necessity. Here are some outstanding statements of his:
1. Give what you have to give. It will come back to you.
2. But do not think of what will come back to you from your giving now. However, it will come back multiplied thousandfold.
3. The attention must not be on what will come back.
4. Yet, have the power to give. Give, and there it ends.