Why ask why? If it's raining it just is.
Good ideas are a dime a dozen, bad ones are free.
Thoughts are the gun, words are the bullets, deeds are the target, the bulls-eye is heaven.
Thinking good thoughts is not enough, doing good deeds is not enough, seeing others follow your good examples is enough.
Strong words are required for weak principles.
It's not a question of happiness, it's a requirement. Consider the alternative.