who only by moving can balance

Simon & Garfunkel:

I stand alone without beliefs
The only truth I know is you.

CN Lester:

with my hands in your hands I'd give up who I think that I am
and if you come as a stranger to me I could lose who I am

Ann Leckie: the entirety of Ancillary Justice. I can't summarise, not really: it's about identity and loyalty and humanity and fragments, about solitude, about constructing the self (over and over again). I cannot praise it highly enough.

Terry Pratchett: the bit from Thief of Time (I do not have my copy to hand) about shattering and recreation from instant to instant.

Indigo Girls:

Thought I knew my mind
Like the back of my hand

[...]

Twisted guardrails on the highway
Broken glass on the cement
A ghost of someone's tragedy
How recklessly my time has been spent
They say that it's never too late
But you don't, you don't get any younger
Well I better learn how to starve the emptiness
And feed the hunger

Up on the watershed
Standing at the fork in the road
You can stand there and agonize
Till your agony's your heaviest load
You'll never fly as the crow flies
Get used to a country mile
When you're learning to face
The path at your pace
Every choice is worth your while

Elementary:

Is that what you think she is? A counterbalance?