Mihaly Csikszentmihalyi: Flow — The Psychology of Optimal Experience

“Learning to use time alone, instead of escaping from it, is especially important in our early years. Teenagers who can’t bear solitude disqualify themselves from later carrying out adult tasks that require serious mental preparation… It is likely that sooner or later behavioral geneticists will find in our chromosomes the chemical instructions that make us feel so uncomfortable whenever we happen to be alone.”