anattā — no “I,” no “mine.” It appears to be so, that there is an “I” in me. It appears to be so: this is “mine.” But as you proceed further — at the experiential level, not at the intellectual level — it becomes so clear: what is “I”?

viññāṇa — the cognizing part of the mind

saññā — the recognizing part (of the mind). The nearest English translation is “perception.” Its job is to recognize.

vedanā — the feeling part (of the mind) — sensations: experiencing sensations on the body

saṅkhāra — the reacting part (of the mind). Its job is to react. ... It is actually the motivation of the mind, the reaction of the mind. It is something which is a heap of action. The first cognizing is not an action; it will not give any fruit. Recognizing is not an action; it won’t give any fruit. Feeling is not an action; it won’t give any fruit. But the saṅkhāra, the reaction, this is an action; this gives fruit. Because you keep repeating, repeating. Words of praise, pleasant sensation, and this part of the mind keeps repeating: “I want it! I want more! I want more!” Repeatedly craving, craving, craving, clinging; continuously craving, clinging, craving, clinging. ... The saṅkhāra is the volition of the mind, which results in the mental action, and this gives fruit.