Looking back, maybe our lives seem like a straight trajectory, but as we all too well know, that's almost never the case in day-to-day living. Each choice we make radiates away from us an endless, infinite variety of smaller choices--rhizomes of possibility, if you'll allow me a gardening metaphor in spite of the snow.
Straight lines make me nervous--they're too much like one-way streets that, once started down, there's no easy way to turn back. No short way, anyway. Instead, I like to think of our trajectory as a circle with countless criss-crossing and looping paths connecting one edge to another.
In a circle, we can never get lost. All we need to do is choose another path that will, eventually, inevitably lead us back to the source.