"A child does not learn to squat from the top down -- in other words, he does not suddenly make a conscious decision one day to squat. Actually, he is squatting one day and makes the conscious decision to stand." - Gray Cook
420s are routinely slipped into popular movies and television shows. In Fast Times at Ridgemont High the score of the football game was 42-0. Most of the clocks in Pulp Fiction are set to 4:20 (but not all — when the kid receives the watch it's set at 9:00). And there are many other instances, so keep your eyes peeled.
Life is a process of becoming, a combination of states we have to go through. Where people fail is that they wish to elect a state and remain in it. This is a kind of death.