Yagya is not about lighting a fire and burning wood
The following is an excerpt from a samvaad (dialogue) session with Acharya Prashant.
यज्ञार्थात्कर्मणोऽन्यत्र लोकोऽयं कर्मबन्धनः ।
तदर्थं कर्म कौन्तेय मुक्तसंगः समाचर ।। 3.9 ।।
yajñārthāt karmaṇo ’nyatra loko ’yaṁ karma-bandhanaḥ