I need to find an English translation of Nefesh Hachaim. Preferably one that is gratis on the World Wide Web. Thanks!
I don't think you will find it online for free, but Nefesh Hachaim By Rav Chaim of Volozhin Translated by: Rabbi Avraham Yaakov Finkel is very good. He does not translate some of the kabbalistic ideas though.
There is now a complete English translation:
Fraenkel, Avinoam (trans./comm.) Nefesh HaTzimtzum: Rabbi Cahim Volozhin’s Nefesh HaChaim with Translation and Commentary, two volumes (Jerusalem – New York: Urim Publications, 2015). This edition provides the complete Nefesh HaChaim in English and Hebrew, along with a wealth of supplementary material, including a “deeply Kabbalistic” tract by Rabbi Yitzchak, Rabbi Chaim’s son, known by the title Maamar BeTzeLeM, DISCOURSE ON THE IMAGE.
The two-volume set can be purchased for about $60 (e.g., at Z Berman, Seforim Center, or Urim Publications). Alas, no free sources discovered so far.