Waste not food, waste not water, waste not fire

Waste not food, waste not water, waste not fire;
Fire and water exist to serve the Self.
Those who realize the Self within the heart
Stand firm, grow rich, gather a family
Around them, and receive the love of all.

-Taittiriya Upanishad

Mystic Mantram

Fire is not seen until one firestick rubs
Against another, though fire is still there,
Hidden in the firestick. So does the Lord
Remain hidden in the body until
He is revealed through the mystic mantram.

Let your body be the lower firestick;
Let the mantram be the upper. Rub them
Against each other in meditation
And realize the Lord.

-Shvetashvatara Upanishad

Rejoice in Lord

The Lord is enshrined in the hearts of all.
The Lord is the supreme Reality.
Rejoice in him through renunciation.
Covet nothing. All belongs to the Lord.
Thus working may you live a hundred years.
Thus alone will you work in real freedom.

-Isha Upanishad

Dreamless Sleep

As an eagle, weary after soaring in the sky, folds its wings and flies down to rest in its nest, so does the shining Self enter the state of dreamless sleep, where one is freed from all desires.

-Brihadaranyaka Upanishad

Immortality

"As rivers lose their private name and form
When they reach the sea, so that people speak
Of the sea alone, so all these sixteen
Forms disappear when the Self is realized.
Then there is no more name and form for us,
And we attain immortality."

-Prashna Upanishad

Realize God

Like oil in sesame seeds, like butter
In cream, like water in springs, like fire
In firesticks, so dwells the Lord of Love,
The Self, in the very depths of consciousness.
Realize him through truth and meditation.

-Shvetashvatara Upanishad

Desires

Never fear that old age will invade that
city; never fear that this inner treasure of all
reality will wither and decay. This knows no
age when the body ages; this knows no dying
when the body dies. This is the real city of
Brahman; this is the Self, free from old age,
from death and grief, hunger and thirst. In the
Self all desires are fulfilled.

-Chandogya Upanishad