Nandi Ji, also known as Nandikeshvara or Nandideva, is a revered deity in Hinduism, worshipped as the sacred bull and vehicle of Lord Shiva. He is also the guardian deity of Kailash, the abode of Shiva. Almost all Shiva temples display stone images of a seated Nandi, generally facing the main shrine. Nandi Ji's significance extends beyond Hinduism, representing the universal values of loyalty, strength, and wisdom. His worship and reverence inspire devotees to embody these qualities in their lives.

Here are some key aspects of Nandi Ji:

1. Vehicle of Shiva: Nandi Ji is the sacred bull and vehicle of Lord Shiva.

2. Symbolism: He represents strength, loyalty, and devotion.

3. Gatekeeper: Nandi Ji is often depicted as the gatekeeper of Shiva's abode, Kailash.

4. Wisdom and knowledge: He is associated with wisdom, knowledge, and intuition.

5. Fidelity and loyalty: Nandi Ji is revered for his unwavering fidelity and loyalty to Lord Shiva.

6. Mantras: The Nandi Mantra, "Om Namo Nandikeshwaraya," is a popular invocation.

7. Worship: Nandi Ji is worshipped alongside Lord Shiva, and his image is often found in Shiva temples.

8. Attributes: He is depicted with a bull's body.

9. Cosmic significance: Nandi Ji represents the cosmic bull, supporting the universe and maintaining harmony.

10. Teachings: Nandi Ji's teachings emphasize the importance of loyalty, devotion, and selfless service.