"At times, our own light goes out and is rekindled by a spark from another person. Each of us has cause to think with deep gratitude of those who have lighted the flame within us." -Albert Schweitzer
"The deepest craving of human nature is the need to be appreciated." -William James
"As we express our gratitude, we must never forget that the highest appreciation is not to utter words, but to live by them." -John F. Kennedy
"Thankfulness is the beginning of gratitude. Gratitude is the completion of thankfulness. Thankfulness may consist merely of words. Gratitude is shown in acts." -Henri Frederic Amiel