It's all a balancing act. Caring for others is a lofty thing, but sometimes one has to step back and extend that care to one's own personhood, also as an act of service. Rest, recreation, study, quiet...are all balances for a life of giving, and modelling such is good for all concerned and important for children to learn/observe. It is easier to take balanced concern for self if it's framed as a part of the equation for service to others. The important thing is to go for balance. I learned/observed this through seeing how normal monastic life is historically structured to ensure health and well-being for all in the community amidst a lifelong dedication to service. The same principles, I believe, extend to all who are engaged in doing what they see as their life's work, which is no less important. I myself have raised four kids.