By Elie KleinHave you ever been vulnerable—to the point where you often rely on others for your immediate needs? But as you read this, I am battling stage 4 colon cancer, and vulnerability has become my reality. After years of telling the awe-inspiring stories of heroic families living with and touched by disability, I finally understand what it means to be vulnerable. While I don’t wish this excruciating experience on anyone, I desperately want to share the accompanying extreme enlightenment with everyone. Acknowledge wheelchair and walker users if you choose to overtake them while walking or riding a bike.