kāmamaya evāyaṃ puruṣa iti You are what your…

kāmamaya evāyaṃ puruṣa iti
You are what your deep, driving desire is

sa yathākāmo bhavati tatkratur bhavati
As your desire is, so is your will

yatkratur bhavati tat karma kurute
As your will is, so is your deed

yat karma kurute tad abhisaṃpadyate
As your deed is, so is your destiny

-Brihadaranyakopanisad 4.4.5

The Maitreyi Yajnavalkya dialogue includes a discussion of…

The Maitreyi-Yajnavalkya dialogue includes a discussion of love and the essence of whom one loves, suggesting that love is a connection of the soul and the universal self (related to an individual):

Lo, verily, not for love of a husband is a husband dear, but for the love of the soul a husband is dear.
Not for the love of the wife is a wife dear, but for love of the soul a wife is dear.
— Brihadaranyaka Upanishad 2.4.2–4

Variant translation:

Truly, it is not due to the love of a husband
that a husband becomes dear,
but due to the love of God
that a husband becomes dear.

Truly, it is not due to the love of a wife
that a wife becomes dear,
but due to the love of God
that a wife becomes dear.

Truly, it is not due to the love of all things
that all things become dear,
but due to the love of God
that all things become dear.

Asatō mā sadgamaya

असतो मा सद्गमय । Asatō mā sadgamaya
From untruth lead us to Truth.

तमसो मा ज्योतिर्गमय । tamasō mā jyōtirgamaya
From darkness lead us to Light.

मृत्योर्मा अमृतं गमय । mr̥tyōrmā amr̥taṁ gamaya
From death lead us to Immortality.

ॐ शान्तिः शान्तिः शान्तिः ॥ Om śāntiḥ śāntiḥ śāntiḥ
Om Peace, Peace, Peace.

-Brihadaranyaka Upanishad 1.3.28

When the speech of this dead person enters…

When the speech of this dead person enters into the fire, breath into the air, the eye into the sun, the mind into the moon, the hearing into space, into the earth the body, into the ether the self, into the shrubs the hairs of the body, into the trees the hairs of the head, when the blood and the seed are deposited in the water, where is then that person?
Brihadaranyaka Upanishad, 3.2.13