Mesillas Yesharim 11 (Chapter 4)

The Ramchal explains what can help motivate people to engage in contemplation and introspection - shleimut or fear of judgment. The most effective way is to contemplate and to always be aware of schar and onesh, that every action, good or bad, has a consequence.

The concept that Hashem is more exacting with the righteous (הקב"ה מדקדק עם הצדיקים כחוט השערה).

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