Gratefulness is not just saying "thank you." It's acting. It is being yourself. A mother is grateful, shows gratefulness by mothering, a scientist by doing science.
David Steindl-RastAs I express my gratitude, I become more deeply aware of it. And the greater my awareness, the greater my need to express it. What happens here is a spiraling ascent, a process of growth in ever expanding circles around a steady center.
David Steindl-RastAmong the many things that profoundly impress me about the Dalai Lama, quite high up on the list is his ability to say "I don't know". I've often wished that other people in prominent positions wouldn't feel the compulsion to have an answer for everything and would feel equally free to say "I don't know." It's a sign of wisdom to know that you don't know and a sign of stupidity to think that you know everything. I admire it enormously in him, and wonder why so few people in leading positions reach that stage.
David Steindl-Rast