There's a quote about standing still which vaguely springs to mind when I think about change, something about knowing when it's time to make a shift or that life is perpetually in motion so there's no point worrying about it.
Distilled knowledge is always half buried when you need it most.
Life is not static, even when everything feels stationary, time flows, pulling us towards unknown events, people and places (This is of particular comfort when remembered halfway through double maths or a bone-achingly dull shift - it must end, as all things do).
I think it's very easy to get swept up in the current of other peoples lives, or the lives you imagine other people expect of you. It's easy to relinquish making hard decisions into the hands of "fate" or outward influences (which I will admit are not always escapable).
There's something to be said for asking yourself what you really want, to examine the desires and spaces we try and cover up because they raise too many awkward questions about who we are and who we might become if given the opportunity.
It's too easy to lie between the possibilities, dreaming about the outcome without committing to it.
Paths untrodden will always remain pristine and pure, unspoiled by the burdens that come from taking them.