No boredom in Krsna consciousness

It is said that it is the nature of a devotee to constantly apply his mind,
energy, words, ears, etc., in hearing and chanting about Krsna. This is
called Krsna consciousness, and for one who is rapt in hearing and chanting
Krsna, the subject matter never becomes hackneyed or old. That is the
significance of transcendental subject matter in contrast to material
subject matter. Material subject matter becomes stale, and one cannot hear a
certain subject for a long time; he wants change. But as far as
transcendental subject matter is concerned, it is called nitya-navayamana.
This means that one can go on chanting and hearing about the Lord and never
feel tired but will remain fresh and eager to hear more and more.
from Krsna, the Supreme Personality of Godhead