Bhagavad Gita Chapter 4 Verse 3
भगवद् गीता अध्याय 4 श्लोक 3

स एवायं मया तेऽद्य योगः प्रोक्तः पुरातनः।
भक्तोऽसि मे सखा चेति रहस्यं ह्येतदुत्तमम्।।4.3।।



हिंदी अनुवाद - स्वामी रामसुख दास जी ( भगवद् गीता 4.3)
।।4.3।।तू मेरा भक्त और प्रिय सखा है इसलिये वही यह पुरातन योग आज मैंने तुझसे कहा है क्योंकि यह बड़ा उत्तम रहस्य है।


English Translation of Sanskrit Commentary By Sri Shankaracharya's
4.3 Sah, that; puratanah, ancient; yogah, Yoga; eva, itself; ayam, which is this; proktah, has been taught; te, to you; maya, by Me; adya, today; iti, considering that; asi, you are; me, My; bhaktah, devotee; ca sakha, and friend. Hi, for; etat, this Yoga, i.e. Knowledge; is a uttamam, profound; rahasyam, secret.
Lest someone should understand that the Lord has said something contradictory, therefore, in order to prevent that (doubt), as though raising a estion,


English Translation of Commentary  - Dr. S. Sankaranarayan
4.1-3 Evam etc.  upto  uttamam.  Eventhough it has come down by regular  succession of teacher,  it is lost now.  By this  [statement]  the Bhagavat indicates the rarity  (or difficulty)  and respectability of this  knowledge.  You are My devotee and friend too :  You are a devotee having nothing but Me as your final goal and you are a friend too.  This  too  indicates the secondary importance  [of the friendship].  Hence, just as in the sentence  wander  begging food  [etc],  the importance  lies in the act of begging food,  but unimportance  in the act of bringing the cow;  in the same way, in the present case it is devotion  towards the  teacher that is important  and not the friendship also.  This is the idea intended here.


English Translation of Ramanuja's Sanskrit Commentary
4.3 It is the same ancient, unchanged Yoga which is now taught to you, who out of friendship and overwhelming devotion have resorted to Me whole-heartedly. The meaning is that it has been taught to you fully with all its accessories. Because it is the most mysterious knowledge declared in the Vedanta, it cannot be known or taught by anyone other than Myself.

In this connection, in order to know the truth about the Lords descent correctly, Arjuna asked:


Transliteration Bhagavad Gita 4.3Sa evaayam mayaa te’dya yogah proktah puraatanah;
Bhakto’si me sakhaa cheti rahasyam hyetad uttamam.


Word Meanings Bhagavad Gita 4.3saḥ—that; eva—certainly; ayam—this; mayā—by me; te—unto you; adya—today; yogaḥ—the science of Yog; proktaḥ—reveal; purātanaḥ—ancient; bhaktaḥ—devotee; asi—you are; me—my; sakhā—friend; cha—and; iti—therefore; rahasyam—secret; hi—certainly; etat—this; uttamam—supreme