God, I wish someone would've told me this before becoming an adult. Thinking back I honestly don't think I was told "it's okay to take a step back."
What I do remember is "Don't Quit". Don't give up, push your boundaries, you never know what you're capable of if you don't try.
But REALLY what I needed to hear all those times is it's okay to take a step back. Yes, all those things above are true but when it really comes down to it taking a step back can be one of the most rewarding things anyone can do.
It's OK. Doing so allows you to re-evaluate what you need to change. Maybe, you've lost your love for an organization. Take a step back. Whether it be a semester off or stepping down from a position, you'll find a sense of relief and possibly remember why you wanted to join in the beginning.
Like a healthy workout schedule, you need that day of rest in order for your body to keep going.
At first you'll hate it. You'll think "who's going to get things done if I'm not there to tell them?" Someone will step up TRUST ME. And maybe, when you're ready to go back they'll have a better understanding of the stress you went through.
What's most important though is that you remember you can't do it all. When you return make sure you set aside a day where you can relax.
It's OK to take a step back. Remember why you love what you do, set a schedule that keeps you healthy and relaxed. And I promise you, even if people aren't understanding at first, a happier and healthier you will return. Everybody will see why you did what you did.