But Balthamos couldn't tell; he only knew that half his heart had been extinguished. He couldn't keep still: he flew up again, scouring the sky as if to seek out Baruch in this cloud or that, calling, crying, calling; and then he'd be overcome with guilt, and fly down to urge Will to hide and keep quiet, and promise to watch over him tirelessly; and then the pressure of his grief would crush him to the ground, and he'd remember every instance of kindness and courage that Baruch had ever shown, and there were thousands, and he'd forgotten none of them; and he'd cry that a nature so gracious could ever be snuffed out, and he'd soar into the skies again, casting about in every direction, reckless and wild and stricken, cursing the air, the clouds, the stars.
Philip Pullman, The Amber Spyglass
grief