I'm only human

I can hold my breath
I can bite my tongue
I can stay awake for days

If that's what you want

I can fake a smile
I can force a laugh

If that's what you ask
Give you all I am

I can do it

But I'm only human 
and I bleed when I fall down
I'm only human
I crash and I break down

I can turn it on
Be a good machine
I can hold the weight of the world
If that's what you need

I can do it

But I'm only human

Just a little human

I can take so much

Until I've had enough

. . .

from the song Human by Christina Perri.