Holy people are called Swamis

Swamis are monks. Swamis wear orange clothes. They leave their homes and families and stay in monasteries. They wish to find God by helping others. One swami who became very famous and found God by serving others was Swami Vivekananda.

Reference: Primary Hinduism by Seeta Lakhani (Ch.1, 'What Is Hinduism', p.9)