In Jain dharma, when negative thoughts arise during Navkar mantra, the main practice is awareness, humility, and return to the mantra without self-judgment.

Here are simple ways to stay focused:

1. Sit quietly before starting

Take a few slow breaths and become still. A calm body helps a calm mind.

1. Remember the meaning of the mantra

The Navkar mantra is not for asking favors; it is for bowing to the five supreme beings and purifying the mind through reverence.

1. If a thought comes, do not fight it strongly

In Jain practice, thoughts arise due to karmic influences. When a paap thought comes, gently notice it and bring the mind back to the mantra.

1. Chant with meaning, not only speed

Say each word clearly and slowly. When the mouth, mind, and meaning are together, distraction reduces.

1. Use a fixed daily time and place

Regular practice at the same time helps the mind settle more easily.

1. Maintain inner repentance and vigilance

If wrong thoughts arise, do not become discouraged. Understand: “This is a disturbance; I choose the sacred mantra again.” That return itself is part of purification.

1. Reduce causes of restlessness

Before chanting, avoid anger, gossip, excess attachment, or unnecessary stimulation. A disciplined life supports concentration.

1. Practice pratikraman-type awareness

If you notice paap thoughts, mentally repent, then continue with renewed purity and humility.

Most important: do not feel defeated by the thoughts. The effort to keep returning to Navkar mantra is itself spiritually valuable. Even repeated return to the sacred mantra weakens the force of unwholesome thoughts over time.

If you want, I can also give you a very short Jain method for chanting Navkar mantra with concentration.