“If a fellow isn't thankful for what he's got, he isn't likely to be thankful for what he's going to get.” ~ Frank A. Clark
Grateful people are able to give thanks for what they have, and in doing so are setting up the conditions for more good to flow into their lives.
We all know what it is like to give to someone who appreciates the efforts we have made. Their appreciation stirs good feelings in us and we want to find ways to give more. The reverse is true as well. If we go out of our way to help someone or give them a gift and we see no visible signs of appreciation, we feel less motivation to give more in the future.
But a person who is unable to experience gratitude for today's gifts is unlikely to be able to find his or her way to gratitude in the presence of future gifts.