Answer
Prabhupada, the founder of ISKCON, was inspired to follow spiritual life by his guru, Bhaktisiddhanta Sarasvati. Bhaktisiddhanta was a prominent religious leader and scholar in the Gaudiya Vaishnava tradition, known for his deep knowledge of scriptures and emphasis on pure devotional practices. Through his teachings and personal guidance, Bhaktisiddhanta motivated Prabhupada to lead a life of devotion to Krishna and dedicate himself to spreading the message of Gaudiya Vaishnavism globally.