Pancadasi - Chapter 1 verse 2

Verse 2: This discussion about the discrimination of Truth (Brahman) from Untruth is being initiated for the easy understanding of those whose hearts have been purified to the pair of lotus feet of the teacher.

My Understanding

"Satyam Brahma" means Truth is Brahman, and Brhadarayanya Upanishad says Sathyam brahmetic jayatimam lokam meaning Truth that is Brahman succeeds everywhere , Brahman is the indesructible Self. The Upanishad continues to say Sathyamhi eva Brahman meaning What else can be truth other than Brahman. So everything else other than brahman which is TRUTH is UNTRUTH.

This verse states therefore Pancadasi or 15 chapters is thus a discussion about Brahman the Truth and how to discriminate between the Truth and Untruth. It could be by "neti-neti" negating everything that is not true ( a longer way ) or just stating the nature of brahman or Truth.

Who is a qualified person ?
A qualified person in the hindu philosophy is he who has completely surrendered to a GURU . Surrendered here refers to surrendering one's ego because a qualified teacher is one who would show the path to the truth and therefore considered even more revered than God.

An aspirant has to qualify himself to a certain degree before he can even absorb the teachings , which would require some homework on the part of the aspirant like a sadhana and the initiation could be in form of a Japa or mantra ( chants) or inculcating the deep meanings of Srutis ( religious texts).

Purified Aspirant under the Guru
An aspirant gets purified under the able guidance of the Guru. Puruification here refers to the purification of the mind being relieved from unwanted or distracting thoughts away from truth.

So the verse states for those qualified students, Pancadasi or 15 chapters would serve as an easy understandign guide towards the path of knowing brahman or the Self. The teaching is for those aspirants who have surrendered to one such guru like Shankarananda of the author (Vidyaranya Swami).