In Jain Dharma, a samyaktvi jīva can fall back into mithyātva when the darśana-mohanīya karma becomes operative strongly enough to cover or distort right faith. This fall is not because the soul’s nature changes, but because the karma obscures the soul’s right perception.

1) What is samyaktva, and what is mithyātva?

• Samyaktva = right faith, right conviction, right seeing of reality.
• Mithyātva = wrong faith, deluded vision, false conviction.

The soul itself is pure and capable of right vision, but due to karma it can see truth or be deluded.

2) How does a samyaktvi fall into mithyātva?

The fall generally happens through the rise, subsidence, or strong influence of darśana-mohanīya karma and related deluding karmas.

Main causes

1. Strong attachment and aversion

- Anger, pride, deceit, greed, and deep attachment weaken clarity.

1. Association with wrong views

- Keeping company with people, teachings, or habits that oppose Jain truth can disturb conviction.

1. Carelessness and spiritual negligence

- Lack of vigilance in vows, study, self-restraint, and reflection.

1. Intensity of deluding karma

- When the covering karma becomes powerful, right faith is obscured.

1. Suppression rather than destruction

- If samyaktva was obtained in a state that is only aupaśamika or kṣāyopaśamika, it can later be covered again.

3) Important doctrinal distinction

Jain tradition distinguishes types of samyaktva:

A. Aupaśamika samyaktva

• Right faith through temporary subsidence of deluding karma.
• Can fall back when karma rises again.

B. Kṣāyopaśamika samyaktva

• Right faith due to partial destruction-cum-subsidence.
• Can also become obscured under strong karma.

C. Kṣāyika samyaktva

• Right faith through complete destruction of the relevant deluding karma.
• Does not fall back into mithyātva.

So when people say “a samyaktvi falls,” they usually mean someone with subdued or partial right faith, not one with fully irreversible kṣāyika samyaktva.

4) The inner process of falling

The fall usually happens step by step:

1. Weakening of vigilance

- The jīva becomes lax in renunciation, study, and self-restraint.

1. Rise of passions

- Kashāyas become stronger.

1. Distortion of judgment

- The jīva begins to doubt, misread, or reject truth.

1. Association with false doctrines or wrong conduct

- Wrong impressions become reinforced.

1. Covering of right faith

- Darśana-mohanīya karma suppresses or reverses samyaktva.

1. Entry into mithyātva

- The soul again accepts wrong views, at least for a period.

This fall may be total or partial, depending on the karmic condition.

5) If this happens, what is guaranteed for such a soul?

This is the reassuring point in Jain Dharma:

1. The soul does not lose its capacity for liberation

Even after falling, the jīva has already tasted right faith. That spiritual impression is not meaningless.

2. Re-attainment of samyaktva is made easier

Once right faith has arisen, its impression remains as a strong spiritual seed. The soul can regain samyaktva more quickly than one who has never had it.

3. The soul is not forever trapped in mithyātva

A jīva who has once awakened to truth has a future in which truth can reappear.

4. Progress toward mokṣa is established

Especially in the case of kṣāyika samyaktva, liberation is certain. Even if there is temporary falling in the lower categories, the spiritual journey has been meaningfully activated.

5. The bond with liberation becomes stronger

The soul has moved from complete spiritual inertia toward a state where mokṣa is possible and increasingly certain, provided effort and right causes continue.

6) Practical Jain understanding

A samyaktvi should therefore protect right faith through:

• Svādhyāya — scriptural study
• Satsaṅga — association with the wise
• Samyama — self-restraint
• Pratikramaṇ — repentance and purification
• Aparigraha — reducing attachment
• Vigilance over passions — anger, pride, deceit, greed

7) In simple words

A samyaktvi falls into mithyātva when deluding karma and passions cover right vision. But this does not mean the soul is lost. If right faith has once arisen, then:

• the seed of truth has already entered,
• the path to mokṣa has begun,
• and the soul can again return to samyaktva.

If you want, I can also give this in a purely scriptural Jain format with the categories of aupaśamika, kṣāyopaśamika, and kṣāyika samyaktva laid out one by one.