If a grandpa can not help but shout to quell a child stubbornly crying, what does it teach the child?
A grown man, a parent, or grandparent should be an example,not of unreasonableness, but of temperance.
To teach humility, the grown man should talk, not with a loud condescending voice, but humbly, to a child.
And especially after knowing that all of us are created in God's image.
Or after remembering that Christ was once a child.