Signed, Sealed, Delivered is a warehouse worker clocking out early to declare his love. Stevie Wonder cut it in 1970 at 23 years old, already blind, already a genius, still sounding like a kid who just realized what he feels. He frames love as a package that has been paid for, processed, and is on its way. Stevie has done everything required. The rest is up to the postal service. He has no control over delivery. All he can do is show up at the door and wait.