What are some important quotes in The Accidental Tourist?

I think that some of the important quotes have to relate
to emotional disposition and how individuals view consciousness through their emotions. 
Macon is the subject of this throughout Tyler's book, so the quotes that describe him
are highly significant.  Sarah might not be the best of characters for Macon, but her
description of him is fairly accurate in terms of where he was and from where he must
progress:

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....there's something so muffled about the way
you [Macon] experience things ... You're encased. You're like something in a capsule.
You're a dried up kernel of a man that nothing real
penetrates.

To a great
extent, Sarah is right about how Macon perceives reality and how he views it after the
death of his son.  The idea of "nothing real penetrates" and Macon's status as a "dried
up kernel" is reflective of the emotional desert that Macon has created for himself.  It
is a scenario that he finds convenient for himself, but one that will inevitably destroy
his own sense of living and being in the world over time.  It is also one that is highly
difficult for other people to share life with Macon in such a condition, reason for
Sarah's departure in the first place as he was unable to provide for her needs in the
grieving for their lost child.

This is not to entirely say
that the emotional failure that Macon demonstrated is something on his shoulders
entirely.  Tyler is really quite profound in suggesting that a person's inability to
share emotional explorations of being in the world could be due to their relationship
with another person.  Sometimes, our moments where we are emotional cripples is because
of the person with whom we are.  The people we interact with help create an emotional
abyss in which we are all too happy to enter.  It is a very interesting dynamic that
Macon brings out when he is describing his relationship with Sarah, and who he was in
it:

[Macon
was]locked inside the standoffish self he'd assumed when he and she first met. He was
frozen there ... Somehow, his role had sunk all the way through to the
heart.

I think it's
significant that Tyler uses the concept of "the standoffish self."  There are times when
people meet other people in a particular frame of reference.  In order to continue
acceptance and the relationship, individuals continue to remain in this condition for
sustenance.  Over time, the persona they assumed at the start of the relationship
becomes who they are in it.  In this, Tyler does not place blame, and does not say that
it is anyone's "fault," but rather it is one where people are simply not their best when
they are with particular people.  In think that both of these quotes speak to the
complex emotional reality that relationships foster.