Bhagavad Gita...

"'Whoever is without attachment in all things,
accepting this or that, pleasant or unpleasant,
neither liking nor disliking,
the wisdom of this one is established.

"'And when this one withdraws,
like a tortoise all its limbs,
the senses from the objects of sense,
the wisdom of this one is established.

"'Objects turn away from the embodied one who is fasting,
except flavor;
even flavor turns away from the one seeing the supreme.
Kaunteya, tormenting senses forcibly carry away the mind
even of the striving person of learning.
Restraining all these,
one should sit unified with me in the supreme;
whose senses are in control,
the wisdom of this one is established.

"'From a person's contemplating objects
is born attachment to them;
from attachment is born desire;
from desire is born anger;
from anger comes delusion;
from delusion, memory wandering;
from memory wandering, loss of intuition;
from loss of intuition, one perishes.

"'Lust and aversion eliminated,
but engaging objects with the senses,
the self-governing by self-control attains tranquillity.
In tranquillity is born cessation of all one's pains.
Having clear thoughts, quickly the intuition becomes steady.

"'There is no intuition for the undisciplined,
and for the undisciplined no concentration,
and without concentration no peace.
Without peace, where is happiness?
When the mind is led by the wandering of the senses,
then it carries away wisdom
like the wind a ship on the water.

"'Therefore, mighty-armed, the one whose senses
are completely withdrawn from the objects of sense,
the wisdom of this one is established.
What is night to all beings
in this the restrained is awake;
what beings are awake in
that is the night of the seeing sage.
Just as waters dissolve in the ocean, filled, unmoved, still,
so too all desires dissolve in the one who attains peace,
not in the desirer of desires.
The person who, giving up all desires,
lives free from longing, without possessiveness,
without egotism, this one attains peace.
This is a holy state, Partha.
No one attaining this is deluded.
Steady in this even at the time of death,
one reaches holy nirvana.'