Multiple sclerosis (MS) can be an overwhelming challenge. One day you can feel strong and resilient, but the next day you can feel helpless and isolated. On these days, getting an extra push or boost from others just like you can make all the difference.

“A positive attitude is the best medicine,” says MS patient Lorri Lowe Peterson of San Jose, California.

So the next time you’re feeling down or discouraged, read over these seven inspirational quotes for some instant motivation.