Guru Nanak, the founder of Sikhism, was a spiritual leader and philosopher who lived during the 15th and 16th century in the Indian subcontinent. His teachings were revolutionary and differed from other religions at the time in various ways.

One of the key differences in Guru Nanak's teachings was his rejection of the caste system. During his time, the caste system was deeply ingrained in the Indian society, and people were divided based on their birth into different social classes. However, Guru Nanak believed in the equality of all human beings, regardless of their caste, gender, or social status. He preached that all individuals are equal in the eyes of the divine and should be treated with respect and dignity.

Moreover, Guru Nanak's teachings emphasized the importance of actively participating in society and serving others. He rejected the idea of renouncing the world and living a life of seclusion. Instead, he encouraged his followers to engage in honest work and contribute to the well-being of their community. This concept of "seva" or selfless service is a fundamental aspect of Sikhism and sets it apart from other religions that promote detachment from the world.

Guru Nanak also rejected the rituals and superstitions that were prevalent in the society at the time. He believed in the power of a personal connection with the divine and emphasized the importance of meditation, self-reflection, and living a moral and ethical life. He taught that true spirituality lies in connecting with the divine through inner reflection and not through external rituals and practices.

Another significant difference in Guru Nanak's teachings was his emphasis on gender equality. During his time, women were considered inferior to men, and their rights and opportunities were limited. However, Guru Nanak challenged this patriarchal mindset and advocated for the empowerment of women. He believed that women have the same potential for spiritual growth as men and should be treated as equals in all aspects of life.

Lastly, Guru Nanak's teachings were inclusive and universal. He rejected the idea of religious exclusivity and preached that all religions lead to the same ultimate truth. He encouraged his followers to respect and learn from other faiths and to see the divine in all beings.

In conclusion, Guru Nanak's teachings differed from other religions at the time in their emphasis on equality, social responsibility, personal connection with the divine, gender equality, and inclusivity. His teachings continue to inspire and guide millions of people around the world, making him a revered figure in the history of humanity.