Bhagavad Gita As It Is

References to text BG 4.3
BG 4.3: That very ancient science of the relationship with the Supreme is today told by Me to you because you are My devotee as well as My friend and can therefore understand the transcendental mystery of this science.

Text
Saint Vidura was a great and pure devotee of the Lord, and therefore his questions to His Grace Ṛṣi Maitreya must have been very purposeful, on the highest level, and approved by learned circles.
Questions by Vidura
SB 3.1.4