Answer

If you want one core Jain text to begin with, the most widely respected and concise foundational text is the Tattvartha Sutra.

Explanation

• It presents the essential principles of Jain Dharma in a very systematic way.
• It is respected across Jain traditions.
• It covers the main truths of Jain philosophy, such as:

- soul - karma - right faith, right knowledge, and right conduct - liberation

If you want to study scriptural roots more deeply, then the Jain Agamas are also central, especially in the Śvetāmbara tradition.

Spiritual Understanding

The Tattvartha Sutra is especially valuable because it gives a clear map of the Jain path. It helps a seeker understand not just beliefs, but the inner discipline leading toward:

• self-purification
• restraint
• karma reduction
• liberation of the soul

Takeaway

For a first core text, start with Tattvartha Sutra. For deeper scriptural study, move toward the Jain Agamas and other traditional Jain texts.