The obvious: Relationships are too much like a garden. Beautiful and enchanting to look at, but you must maintain the flowers and prune the weeds, while small, or they will overtake its beauty. You must always be willing to work at it, and treat it with respect, and it will continue to take your breath away.
Not so obvious: Some times you need a few piles of cow crap before blooms start again.
(from my 2009 article at 4-evercaptured.com)