Gita Chapter 8

 Remember God at the time of death 

Types of yugas

• Satya Yuga: The age of truth, when humanity is governed by gods 
• Treta Yuga: The age of thought, when people have strong mental powers and are peace-loving
• Dvapara Yuga: The third of the four yugas in a Yuga Cycle 
• Kali Yuga: The current epoch, characterized by moral decline and spiritual deterioration 

cosmos - Bramha - manifest to unmanifes ;  Shiva 

Bramha live for 100 years 

Bhagavad Gita: Chapter 8, Verse 1-2

अर्जुन उवाच |
किं तद्ब्रह्म किमध्यात्मं किं कर्म पुरुषोत्तम |
अधिभूतं च किं प्रोक्तमधिदैवं किमुच्यते || 1||
अधियज्ञ: कथं कोऽत्र देहेऽस्मिन्मधुसूदन |
प्रयाणकाले च कथं ज्ञेयोऽसि नियतात्मभि: || 2||

arjuna uvācha
kiṁ tad brahma kim adhyātmaṁ kiṁ karma puruṣhottama
adhibhūtaṁ cha kiṁ proktam adhidaivaṁ kim uchyate
adhiyajñaḥ kathaṁ ko ’tra dehe ’smin madhusūdana
prayāṇa-kāle cha kathaṁ jñeyo ’si niyatātmabhiḥ

arjunaḥ uvācha—Arjun said; kim—what; tat—that; brahma—Brahman; kim—what; adhyātmam—the individual soul; kim—what; karma—the principle of karma; puruṣha-uttama—Shree Krishna, the Supreme Divine Personality; adhibhūtam—the material manifestation; cha—and; kim—what; proktam—is called; adhidaivam—the Lord of the celestial gods; kim—what; uchyate—is called; adhiyajñaḥ—the Lord all sacrificial performances; katham—how; kaḥ—who; atra—here; dehe—in body; asmin—this; madhusūdana—Shree Krishna, the killer of the demon named Madhu; prayāṇa-kāle—at the time of death; cha—and; katham—how; jñeyaḥ—to be known; asi—are (You); niyata-ātmabhiḥ—by those of steadfast mind

arjuna uvacha
kim tad brahma kim adhyatmam kim karma purushottama
adhibhutam cha kim proktam adhidaivam kim uchyate
adhiyajnah katham ko ’tra dehe ’smin madhusudana
prayana-kale cha katham jneyo ’si niyatatmabhih

Translation

BG 8.1-2: Arjun said: O Supreme Lord, what is Brahman (Absolute Reality), what is adhyatma (the individual soul), and what is karma? What is said to be adhibhuta, and who is said to be Adhidaiva? Who is Adhiyajna in the body and how is He the Adhiyajna? O Krishna, how are You to be known at the time of death by those of steadfast mind?

Bhagavad Gita: Chapter 8, Verse 8

अभ्यासयोगयुक्तेन चेतसा नान्यगामिना |
परमं पुरुषं दिव्यं याति पार्थानुचिन्तयन् || 8||

abhyāsa-yoga-yuktena chetasā nānya-gāminā
paramaṁ puruṣhaṁ divyaṁ yāti pārthānuchintayan

abhyāsa-yoga—by practice of yog; yuktena—being constantly engaged in remembrance; chetasā—by the mind; na anya-gāminā—without deviating; paramam puruṣham—the Supreme Divine Personality; divyam—divine; yāti—one attains; pārtha—Arjun, the son of Pritha; anuchintayan—constant remembrance

abhyasa-yoga-yuktena chetasa nanya-gamina
paramam purusham divyam yati parthanuchintayan

Translation

BG 8.8: With practice, O Parth, when you constantly engage the mind in remembering Me, the Supreme Divine Personality, without deviating, you will certainly attain Me.