"Patience is not the ability to wait, but the ability to keep a good attitude while waiting."- Bob Proctor.
Everyone can lay claim to being patient, but it takes some certain level of maturity to be really patient in every sense of the word.
When you grumble under the pretence of being patient, you are not in anyway patient.
The ability to keep a good and fair attitude during your patient wait is what the true test of patience is.