Can just one mitzvah earn you a place in Olom Haba?

Shiur #63 in Rav Aharon Kahn’s Hashkafah Series Based on Mishlei with Biur HaGra.

Content Description: The reason why there are so many mitzvos. Can just one properly performed mitzvah radically affect one's spiritual balance sheet? The greatness and expanse of Torah, and the natural propensity of Jews towards Torah and mitzvos.

Citations: This shiur references the following source: Sefer Tiferes Yisroel of the Maharal of Prague, chapter 5, found in the source packets on pages 1-3.