स एवायं मया तेऽद्य योगः प्रोक्तः पुरातनः।
भक्तोऽसि मे सखा चेति रहस्यं ह्येतदुत्तमम्।।4.3।।
श्रीमद् भगवद्गीता
मूल श्लोकः
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.
Commentary:
This Yoga contains profound and subtle teachings. Hence it is the supreme secret which is revealed by the Lord.