This teen basketball player thought his neighbor was coming over to complain about noise. Watch the video to see what happens next.

"You have a moral obligation ... to assume that, despite all evidence, there's actually something of intrinsic worth about you and that, as a consequence, you're duty bound to treat yourself like that is true and then it turns out, if you do that, then your life gets better," said Jordan Peterson.

An elderly woman lost her husband and home at the same time. Her neighbors—a family with eight kids living in a three-bedroom home—took her in.

Cole Blakeway talked about his friendship with an autistic man named Steven in his TEDx Talk about being different. "We are all a little different, and that's awesome," he said.

"People think that being optimistic is being positive 24/7. In reality, that's not possible. A true optimist is someone who is very keenly aware of setbacks ... but sees them as temporary and something that they have the ability to overcome, even if they don't know how," said Dr. Deepika Chopra, known as the "Optimism Doctor."