What is the absent-mindedness which he experiences both in and out of meditation? If this is accompanied by a blissful feeling, it is nothing to get anxious about and would indeed be a sign of the spiritual force working underground. Even so it would completely disappear in time as he will have to get and keep full consciousness. However, if the blissful feeling is absent, then it is a mental difficulty which he must strive to overcome by using his willpower.
-- Notebooks Category 4: Elementary Meditation > Chapter 1: Preparatory > # 431