मात्रास्पर्शास्तु कौन्तेय शीतोष्णसुखदुःखदाः ।
आगमापायिनोऽनित्यास्तांस्तितिक्षस्व भारत ॥ १४ ॥
mātrā-sparśās tu kaunteya
śītoṣṇa-sukha-duḥkha-dāḥ
āgamāpāyino ’nityās
tāṁs titikṣasva bhārata

O son of Kuntī, the nonpermanent appearance of happiness and distress,
and their disappearance in due course,
are like the appearance and disappearance of winter and summer seasons.
They arise from sense perception, O scion of Bharata,
and one must learn to tolerate them without being disturbed.
(Bhagavad-gita 2.14)

ॐ अपवित्रः पवित्रो वा सर्वावस्थां गतोऽपि वा ।
यः स्मरेत्पुण्डरीकाक्षं स बाह्याभ्यन्तरः शुचिः ॥
om apavitraḥ pavitro vā
sarvāvasthāṁ gato ’pi vā
yaḥ smaret puṇḍarīkākṣaṁ
sa bahyābhyantara-śuciḥ

Whether pure or impure, or having passed through all conditions of material life,
one who remembers lotus-eyed Krsna becomes externally and internally clean.
(Garuda Purana)