It is okay to say I do not know the answer and you are willing to find out the detail. We are humans, not machines. There are times we are in our best moments but other times we could get it all wrong. And when we get it wrong, it fine to admit you got it wrong and you would strive to do your best next time.
We should not loose it when our expectations do not come our ways and talk down ourselves as though we complete failure in life. We have to learn our lessons and build on those experiences to become the best version of ourselves.
