What does Siddhartha conclude about finding peace?

"Peace" is used no fewer than 15 times in
Siddhartha.

• Peace is mainly
  connected to Gatama (Buddha).  Siddhartha
  says:

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...his quietly dangling hand expressed peace,
expressed perfection, did not search, did not imitate, breathed softly in an
unwhithering calm, in an unwhithering light, an untouchable
peace.

• Near
  the beginning of the novel, Siddhartha says that his father, though a Brahmin (priest),
  did not have peace:

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...but even he, who knew so much, did he live in
blissfulness, did he have peace, was he not also just a
searching man, a thirsty
man?

• Siddhartha
  says that Vasudeva also has attained peace by the
  river:

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With a bright smile, he left; Siddhartha watched
him leaving. With deep joy, with deep solemnity he watched him leave, saw his steps full
of peace, saw his head full of lustre, saw his body full of
light.

• Siddhartha
  says that Kamala has peace that few people
  have:

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You are Kamala, nothing else, and inside of you,
there is a peace and refuge, to which you can go at every
hour of the day and be at home at yourself, as I can also do. Few people have this, and
yet all could have
it.”

• Siddhartha
  also admits that his son is not a source of peace, but of
  worry.

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Siddhartha began to understand that his son had
not brought him happiness and peace, but suffering and
worry.

• Govinda
  admits that he has not found peace, even as an old
  man:

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“Siddhartha,” he spoke, “we have become old men.
It is unlikely for one of us to see the other again in this incarnation. I see, beloved,
that you have found
peace.

• Siddhartha
  answers Govinda:

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...I cannot love words. Therefore, teachings are
no good for me, they have no hardness, no softness, no colours, no edges, no smell, no
taste, they have nothing but words. Perhaps it are these which keep you from finding
peace, perhaps it are the many
words.

So, peace is being at
home with yourself, and it is not found in words or the teachings directed at others.
 Peace, it seems, is intensely personal, and it is connected to one's vocation.  It can
be found by a courtesan (prostitute) Kamala, the Buddha, or the ferryman Vasudeva.  Most
of all, peace comes with a thirst and a search for it.