You cannot miss what you have never had.

I am not who I was,' he whispered, gripping the edges of the column, 'but I know who I am.'...
'And I won't give up.

Love, family, accomplishments - they are all torn away, leaving nothing. What is the worth of anything we do?
Saphira: The worth is in the act. Your worth halts when you surrender the will to change and experience life.

Congratulations, you've just been promoted!

Eragon cried out, and in his desperation he reached for Saphira and the Eldunarí... and without meaning to, he drew from their stories of energy.
And with that energy he cast a spell.
It was a spell without words... His was a spell of instinct and emotion; language could not contain it.

What have you done?' he said, his voice hollow and strained. He stepped back and put his fists to his temples. 'What have you done!'
With an effort, Eragon said, 'Made you understand.