I hope i can find that story narrated by Salman(ra).
About a Grateful man who used to Praise Allah :swt: much. And strangely the more he Praised Allah :swt:, the more things would be taken from him.
And yet still he continues to Praise Allah. Until one day a man asks him; "what is left in your possession that you are still praising Allah for? You have nothing" He answered; "I Praise, Thank Allah for that which He has given me but I could not give to anyone else!"
Don't you see your eyes, don't you see your hands, your legs, your mind, your sanity, your health, your tongue, your speech, your organs.
Don't you see that you can smell, you can taste, you can walk, you can bow and you can prostrate. SubhanAllah
The ultimate state of Gratitude is to be grateful for what you have left when something you had is taken away from you.
وَإِن تَعُدُّوا نِعْمَةَ اللَّـهِ لَا تُحْصُوهَا
And if you were to count Allah's favors, you would not be able to number them;[16:18]
أَنِ اشْكُرْ لِي وَلِوَالِدَيْكَ
Be grateful to Me and to your parents;[31:14]