http://revach.net/article.php?id=5344

Section:  Avodah   Category: Tehilim
Tehilim Perek 49: Beis Yisroel of Ger - Even Some Mitzvos Won't Go With You

Dovid HaMelech tells us in Tehilim (49:18) כִּי לֹא בְמוֹתוֹ יִקַּח הַכֹּל, when you die you won't take everything with you. The Gerrer Rebbe the Beis Yisroel asks, the word "everything" implies that some things you will take with you after death. but not everything.

This being the case, the pasuk cannot be referring to material objects, since you can't take "any" of your material items with you. Therefore he deduces that Dovid HaMelech is telling us we can't even take all our mitzvos with us. This seems strange. Why can't we take all of our mitzvos with us to Olam Haba? Why are they left behind in the material world?

The Gerrer Rebbe says the next few words of the pasuk reveal the answer. לֹא יֵרֵד אַחֲרָיו כְּבוֹדוֹ, his honor will not follow him to the world of truth, the eternal world. Any mitzva that was done for the sake of Kavod has no place in Shamayim, and will not go with you. These mitzvos will be left behind in the world that reveres Kavod. A world suited for them. You did it for the sake of benefiting in the material world, and in the material world they will remain forever.