The idea of trust in God was the major focus of Navardok. Even though in the Madgragat HaAdam [the major book of Yoseph Yozel Horwitz] the founder of that branch of the Musar movement has one chapter devoted to trust in God, it is a theme that permeates the entire book.
The basic approach from how I understood it in the Mir in NY is to do what is required of you and leave the rest up to God. There that meant in translation "learn Torah and God will take care of everything else". And in fact that worked for people very well.
My own approach at this point however is slightly different. I hold from that basic structure except that I would add learning Physics and Metaphysics as part of the category of "learning Torah" as mentioned in all book of Maimonides and was apparently the general approach of the Rishonim who based themselves on Rav Hai Gaon. [You can see this also in the Obligations of the Hearts a Rishon who came before the Rambam.]
The basic approach from how I understood it in the Mir in NY is to do what is required of you and leave the rest up to God. There that meant in translation "learn Torah and God will take care of everything else". And in fact that worked for people very well.
My own approach at this point however is slightly different. I hold from that basic structure except that I would add learning Physics and Metaphysics as part of the category of "learning Torah" as mentioned in all book of Maimonides and was apparently the general approach of the Rishonim who based themselves on Rav Hai Gaon. [You can see this also in the Obligations of the Hearts a Rishon who came before the Rambam.]
