I don't see the two as being opposite one another and I don't hear "intent" mentioned.

You can "miss" destiny by choice or by not paying attention but also can get there by serendipitous happenings that one doesn't expect. But one has to be facing where one wants to go, know what one wants (that is one's to want -- can't want someone else to want one, for example, you may not be their destiny) and going in that direction if you expect to get to the "end". I don't believe in ends though, one doesn't ride off into the sunset happily ever after or die, go to Heaven, and sit on a cloud strumming a harp for Eternity.

I think one has to imagine and dream about what one wants but then going toward it as well as one is able is the next step. There is no "magic" involved where Destiny literally grabs you from some other path and slings you over to this one you've never imagined or anything. Yes you may end up with Person B when you thought you wanted Person A but you'll meet them at some junction where you got by shanks mare, not magic.