I am of the belief that there are two types of action:

1. externally motivated/forced urgency type of action
   and
2. internally inspired action

I'd say it shorter:
two types - "you have to" and "you want to"

The more "I want to" actions you do, the happier you are.

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As Chekhov said, brevity is the sister of talent (his actual words) (english equivalent - brevity is the soul of wit)

I'd say, brevity - sis
(english variant - brevity - soul)
=)