You can't pour from an empty cup.

If you do not care for your own mental health and well-being, you will not be able to adequately give emotional care or support to others. A: "I know my mom needs me by her side right now, but I'm just so burnt out from work and dealing with my own kids." B: "You can't pour from an empty cup, Tom. You've got to set aside a bit of time for yourself to recover before you can start thinking about helping your mom." With how much pressure there is on people to push themselves to the limit for the sake of their jobs, is it any wonder that personal relationships are suffering? You can't pour from an empty cup, after all."