A man reached 70 years of age and he faced a disease; he could not urinate. The doctors informed him that he was in need of an operation to cure this disease. He agreed to have the operation done as the problem was giving him much pain for days. When the operation was completed, his doctor gave him the bill which covered all the costs. The old man looked at the bill and started to cry. Upon seeing this the doctor told him that if the cost was too high then they could make some other arrangements.
The old man said “I am not crying because of the money but I am crying because Allah let me urinate for 70 years and He never sent me a bill.”

…and if you try to count the blessings of Allah, never will you be able to count them… {Surah Ibrahim}