As with many other things in life, happiness is a feeling, a certain something that we all yearn to have.
All too often, we aim for the stars, only to find ourselves stranded on the moon. We know we can't reach that far, but we refuse to believe in what we know, and fall for what we feel.
To be rational, is to believe what is logical, realistic and sensible.
To be otherwise is futile, pointless and a waste of time.