Death is an inevitable cycle. But sickness before death is a symptom of resistance. Most people think they've got to get sick to die. But, you could be like the cat who chooses to get run over. Or, you could just lie down in your bed happily one night, so content and thoughtless, wanting nothing in this physical world; and just reemerge into Pure Positive Energy... You can play it out any way you choose.
Nothing is more debilitating than to care about something you can't do anything about. And you can't do anything about your adult children. You can want better for them, and maybe even begin to provide something for them, but in the long run, you cannot do anything about someone else's vibration other than hold them in the best light you can, mentally, and then project that to them. And sometimes, distance makes that much more possible than being up close to them.
When a child has a dream and a parent says, "It's not financially feasible; you can't make a living at that; don't do it," we say to the child, run away from home... You must follow your dream. You will never be joyful if you don't. Your dream may change, but you've got to stay after your dreams. You have to.