The phrase "Ja taru modhu kalu kar" is a famous proverb in Jainism, often cited in Jain literature and teachings. It translates to "If you make your honey bitter, who will eat it?" In the context of Jain philosophy, this proverb is used to convey the importance of maintaining one's own virtues, sweetness of conduct, and righteousness.

In Jainism, it is believed that one's behavior and speech should be pure, non-hurtful, and pleasant. If a person becomes bitter, harsh, or negative (akin to making honey bitter), others will naturally avoid them, and their life will lack harmony and spiritual progress. The proverb encourages self-reflection, improvement of one’s own character, and practicing ahimsa (non-violence) and maitri (friendliness) towards all.

This teaching is often used to inspire individuals to focus on their own actions and attitudes, ensuring they remain virtuous, compassionate, and pleasant in their dealings with others.