We all succumb to it sometimes. We give into fear. Self-doubt takes over. Regardless of past successes, we start to wonder whether we'll accomplish anything big again.

Or else, we think about the big problems facing the world and can't imagine any way we could make things better.

Here's someone to think about the next time that happens to you.

Meet Isiah Britt, a 7-year-old boy from Virigina who was so moved by the water crisis in Flint, Michigan that he decided to do something about it.

(Just to emphasize that--Isiah lives almost a thousand miles away from Flint. This story is about a second grader deciding to help people in a community far away.)

The background, in case you haven't followed this story closely, from the website ScaryMommy (disclosure: my company owns ScaryMommy).

The problems started in April 2014 when, in an attempt to save money, Flint city officials stopped using Detroit's water system and started supplying residents with water from its own treatment plant that brought water in from the Flint River. It is unclear how many people consumed the contaminated water, but all of the Flint residents under six years old, about 8,657 in total, have been exposed to toxic amounts of lead, according to the Detroit Free Press.

Isiah, who attends Buckland Mills Elementary School in Gainesville, Virginia, called one of the elementary schools in Flint to ask what he could do to help. He learned about a problem that just about everyone else had overlooked: while big companies were rushing to deliver bottled water to Flint, that water was strictly for drinking. Meantime, students in the city's 12 elementary schools were still afraid to wash their hands using the city water supply.

"His voice, his demeanor, everything about him touched my heart," the school secretary who talked with him, Lisa Palermo told The Washington Post. "I've worked with the district over 20 years and I've never, the words don't explain it, he touched my heart to no end."

It was a small part of the problem, but Isiah decided to come up with a solution: A GoFundMe page, which he set up with his parents, on which he set out to raise $500 "buy hand sanitizer for their school."

As happens sometimes these days--the campaign raised far more than Isiah had set out to collect--$10,000 so far, which is enough to deliver hand sanitizer to every classroom in every elementary school in the city.

"That was the best day of my life, trying to help a different school. It doesn't matter if you're small. It doesn't mean you can't do big things," Isiah said.