" Consider how flight attendants explain airline safety to passengers. In the event the cabin decompresses, you’re supposed to put on your oxygen mask before helping others put on their masks. Help yourself first. Then, assist others. These instructions aren’t intended to promote self-preservation. Rather, the airline knows that if you help others first, you risk succumbing to hypoxia. And that would prevent you from helping anyone. "

― Damon Zahariades , The Art Of Saying NO: How To Stand Your Ground, Reclaim Your Time And Energy, And Refuse To Be Taken For Granted (Without Feeling Guilty!)