A Bill is paid by some when due, some when overdue, and some never do.

A Bill travels through the mail at twice the speed of checks.

A Diagnosis is arrived at by the doctor first asking the patient what's wrong, and then the patient asking the doctor.

Diagnosis is crucial — disease known is half cured

Diagnosis is important — the beginning of health is to know the disease.

Diagnosis is important — a disease known is half cured.