 A few of these Living Masters of their times include Lao Tsu, Jesus, Pythagoras, Socrates, Kabir, the Sufi Masters, and mystic poets, Hafez and Rumi, the Ten Sikh Gurus beginning with Guru Nanak, Tulsi Sahib, and the Radhasoami/Radha Soami and offshoot Masters, including Shiv Dayal Singh, Baba Sawan Singh, Baba Faqir Chand, and Sant Kirpal Singh.The ten Sikh Satgurus (Nanak Panthis) discuss the inner sound and inner light a lot in their scriptures.The first Sikh Satguru was Guru Nanak, but his master (guru) was Waheguru.