On choosing friends

I recently got an email from a friend:

"Associate only with positive, focused people who you can learn from and who will not drain your valuable energy with complaining and uninspiring attitudes. By developing relationships with those committed to constant improvement and the pursuit of the best that life has to offer, you will have plenty of company on your path to the top of whatever mountain you seek
to climb."

I think my subconscious wanted to add something to this as I was trying to take a nap this afternoon:

We need to stay with friends who believe in our potential, whose vision of us is loftier than our own dreams.