Harmonious means to have the parts agreeably related.
Your work will never really be "in balance" with the rest of your life. Yet, you can cultivate a more harmonious state of being so that the two are more agreeably related. Though nothing is harmonious by chance, you need to cultivate it.
Stop struggling, always sacrificing one thing for another, chasing the myth that you can have it all when all that gets you is burnout.