Sārathi
  1. 5.21

    बाह्यस्पर्शेष्वसक्तात्मा विन्दत्यात्मनि यत्सुखम्।
    स ब्रह्मयोगयुक्तात्मा सुखमक्षयमश्नुते ॥

    bāhya-sparśheṣhvasaktātmā vindatyātmani yat sukham
    sa brahma-yoga-yuktātmā sukham akṣhayam aśhnute

    With the self unattached to external contacts, he finds happiness in the Self; with the self engaged in the meditation of Brahman, he attains endless happiness.
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  2. 5.22

    ये हि संस्पर्शजा भोगा दुःखयोनय एव ते।
    आद्यन्तवन्तः कौन्तेय न तेषु रमते बुधः ॥

    ye hi sansparśha-jā bhogā duḥkha-yonaya eva te
    ādyantavantaḥ kaunteya na teṣhu ramate budhaḥ

    The enjoyments that arise from contact are only sources of pain, for they have a beginning and an end, O Arjuna; the wise do not rejoice in them.
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  3. 5.24

    योऽन्तःसुखोऽन्तरारामस्तथान्तर्ज्योतिरेव यः।
    स योगी ब्रह्मनिर्वाणं ब्रह्मभूतोऽधिगच्छति ॥

    yo 'ntaḥ-sukho 'ntar-ārāmas tathāntar-jyotir eva yaḥ
    sa yogī brahma-nirvāṇaṁ brahma-bhūto 'dhigachchhati

    He who is happy within, who rejoices within, and who is illuminated within, that Yogi attains absolute freedom, or Moksha, becoming Brahman himself.
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  4. 18.39

    यदग्रे चानुबन्धे च सुखं मोहनमात्मनः।
    निद्रालस्यप्रमादोत्थं तत्तामसमुदाहृतम् ॥

    yad agre chānubandhe cha sukhaṁ mohanam ātmanaḥ
    nidrālasya-pramādotthaṁ tat tāmasam udāhṛitam

    That happiness which at first, as well as in the end, deludes the self, and which arises from sleep, indolence, and heedlessness—that is declared to be Tamasic.
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  5. 18.38

    विषयेन्द्रियसंयोगाद्यत्तदग्रेऽमृतोपमम्।
    परिणामे विषमिव तत्सुखं राजसं स्मृतम् ॥

    viṣhayendriya-sanyogād yat tad agre ’mṛitopamam
    pariṇāme viṣham iva tat sukhaṁ rājasaṁ smṛitam

    That happiness which arises from the contact of the senses with the objects, which is initially like nectar but eventually like poison, is said to be Rajasic.
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  6. 18.37

    यत्तदग्रे विषमिव परिणामेऽमृतोपमम्।
    तत्सुखं सात्त्विकं प्रोक्तमात्मबुद्धिप्रसादजम् ॥

    yat tad agre viṣam iva pariṇāme 'mṛtopamam tat sukhaṁ sāttvikaṁ proktam ātma-buddhi-prasāda-jam

    That which is like poison at first but in the end like nectar—that happiness is declared to be sattvic, born of the purity of one's own mind due to self-realization.
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