What motivates you to get stronger (muscle gain stronger)?

I'm interested to hear others and their journey. I'm 20, female, and a runner right now. And currently I weigh around 145 and 150. I'm 5foot 6inches by the weigh. Basically what motivates me is going to the gym each morning seeing I can run faster, lift better, and just feel better knowing my hard work at the gym is paying off.

My heaviest weight was when I was in middle school at 210 pounds. My lowest however was 115 pounds. Yes, I was both overweight and underweight. I wasn't always a total gym rat. Actually, I use to have a huge fear of certain foods to the point where I used Vegetarianism as a way to avoid so many food groups. Which is what caused me to become underweight. I was a Vegetarian for 5 years until I met my boyfriend now who is a farmer so yes, he is a meat eater. And he is the one who is currently helping me get use to food again. I will admit chicken is my favorite though.