A person with a thankful heart recognizes waking up to a new day is a blessing. It is a gift from God.
He praises the Lord instead of complaining. He knows people are praying for the things he has and that his circumstances could be worse.
A person with a thankful heart has joy. The joy of Jesus.
He tells the Lord, "Thank You." Not only because of stuff or for what the Lord has done does he thank Him, but just because of who He is.