Answer

The key difference is:

• Jiva is the soul itself — a living substance or dravya.
• Chetna or chaitanya bhava is the conscious nature, awareness, or sentient quality of that jiva.

In simple words: jiva is the entity, and chetna is its essential quality.

Explanation

In Jain Dharma:

• Jiva means the conscious living soul.
• It is eternal, independent, and possesses qualities like consciousness, knowledge, and perception.
• Chaitanya bhava refers to the fact that the jiva is aware, knows, and experiences.
• So chaitanya is not a separate soul; it is the inherent nature of jiva.

A simple analogy:

• Jiva is like the lamp.
• Chaitanya is like the light of the lamp.

Without the lamp, there is no light in that form; without jiva, there is no chetna manifesting as living awareness.

Spiritual Understanding

This distinction is important because Jain philosophy teaches that:

• The soul is not inert matter.
• The true identity of the being is the jiva, not the body.
• Consciousness is the proof of jiva’s presence.
• When the soul becomes free from karmic bondage, its chaitanya shines in full purity as keval jnana.

So, jiva is the self, and chetna is the self’s living awareness.

Takeaway

Jiva = soul as a substance. Chetna / chaitanya bhava = the conscious nature of that soul.

So they are closely related, but not the same: one is the owner, the other is its essential quality.