Bhagavad Gita Chapter 8, Verse 27

नैते सृती पार्थ जानन्योगी मुह्यति कश्चन | तस्मात्सर्वेषु कालेषु योगयुक्तो भवार्जुन ||

naite sṛtī pārtha jānan yogī muhyati kaścana tasmāt sarveṣu kāleṣu yoga-yukto bhavārjuna

Knowing these two paths, O Partha, no yogi is deluded. Therefore, at all times, be steadfast in yoga, O Arjuna.

Krishna gives the practical instruction: 'Naite sriti partha janan yogi muhyati kashcana'—knowing (jannan) these (ete) two paths (sriti), O Arjuna (partha), no (na) yogi (yogi) is deluded (muhyati), anyone (kashcana). 'Tasmat sarveshu kaleshu yoga-yukto bhavarjuna'—therefore (tasmat), at all times (sarveshu kaleshu), be (bhava) steadfast (yoga-yuktah) in yoga, O Arjuna. This is the key: knowing these two paths prevents delusion. When you understand the path of light and the path of darkness, you're not confused about which path to take. This knowledge helps you choose consciously—the path of light that leads to liberation. Therefore, be steadfast in yoga at all times—practice constantly, remember constantly, so you naturally walk the path of light. This is the practical application: know the paths, and be steadfast in yoga.