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.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
न ह्यल्पार्थोदयस्तस्य विदुरस्यामलात्मनः । तस्मिन् वरीयसि प्रश्नः साधुवादोपबृंहितः
na hyalpārthodayastasya vidurasyāmalātmanaḥ | tasmin varīyasi praśnaḥ sādhuvādopabṛṃhitaḥ
SB 3.1.4