I have never yet met someone who:
Never got angry
Never said something they later wished the had not
Never said anything unwise
Never felt their temper rise to meet others words.
Never became impatient

It does not matter their race, creed, gender, or any other quality about them or their life.

They are human with human virtues and human failings.

The most we can hope for ourselves is that we can:

Be wise more often than we are foolish
Be peacemakers more often than we are warmongers
Be quiet talkers more often than we are shouters
Be compassionate more often than we are uncaring
Be bridges more often than we are walls
Be listeners more often than we feel the need to talk
Be gentle more often than we are harsh
Be forgiving more often than we are condemning

And that in the end we don't beat others or ourselves up with a ruddy great stick for making a mistake.

And remember :-) just because you are old and grumpy does not mean you cannot be nice sometimes.