if there's no sadness, so does happiness.

what is the meaning of happiness when there's no sadness ? none.
sometimes we forget how it feels to be happy because we get used to it.
like when we smell the sweet scent of flowers at the garden, but after an hour or so,
our sense get used to it and we couldn't smell that sweet sent anymore.
unless we leave it for a moment.
like the old saying says, right.
you'll never know what you've got things till its gone