Sbg 4.3 ecsiva
English Commentary By Swami Sivananda 4.3 सः that, एव even, अयम् this, मया by Me, ते to thee, अद्य today, योगः Yoga, प्रोक्तः has been taught, पुरातनः ancient, भक्तः devotee, असि thou art, मे My, सखा friend, च and, इति thus, रहस्यम् secret, हि for, एतत् this, उत्तमम् best.