There are two taanugs. One is for the completion of a project. נועץ תכילתן בסוף וסוף בתחלתן. And one is for the pleasure of the You the Thinker who thought of the idea in the first place and the pleasure of putting oneself into the project. The You gets pleasure also after it is done. סוף מעשה מחשבה תחילה. Techila vs Rosh. In Chassidus techila precedes the Rosh of something. Dira B’Tachtonim. the Chitzonius HaRatzon is to create a world. the Pnimius HaRatzon is that Neshamas in Gufim will do Torah and Mitzvos. Hashem (if we can say so) gets pleasure from creating the world and then also for the Torah and mitzvos.
