The basic difference is that quiet can mean little or no noise, but silent means ZERO noise. If you describe somebody as quiet, it means that person doesn't talk very much. People can also talk quietly (with a very low volume) but it’s impossible to talk silently!
Fact
The longest kiss on record lasted 30 hours and 45 minutes. Dror Orpaz and Carmit Tsubara recorded it on April 5, 1999 at a kissing contest held in Tel Aviv, Israel .. More >>