Trust in God with no effort was brought by Rav Israel Salanter as being mentioned in Nahmanides/(Ramban). But I have not heard where that statement of the Ramban is.
However clearly it is in the Gra in Mishlei/Proverbs.
IN the Obligations of the Hearts [Chovot Levavot] by Ibn Pakuda it is brought in a slightly different way that when one trusts in God and places all his effort towards teh serve of God then God takes away the yoke of things of this world and in particular the money issues.
However in the Mir in NY where I learned about this idea, it was understood that service of God means to learn Torah. [i.e. Gemara in depth with Rav Haim of Brisk and the other sages of Lithuania like Rav Shach.]
The only difference is that I would like to add learning Physics and Metaphysics to what is in the category of serving God.
[That is quite clear in the Rambam in the Guide and also in the Mishne Torah in a slightly round about way. But it is not his particular new idea as you see it is most of the sages of Sefarad that followed Rav Saadia Gaon.
Ashkenazim more or less rejected that approach. However you do see it somewhat in the Gra in the Translation of Euclid done by a disciple of the Gra who quotes the Gra thus: "One who lacks any knowledge in any one of the seven wisdoms will be lacking in understanding of Torah 100 times in proportion".
IN the Obligations of the Hearts [Chovot Levavot] by Ibn Pakuda it is brought in a slightly different way that when one trusts in God and places all his effort towards teh serve of God then God takes away the yoke of things of this world and in particular the money issues.
However in the Mir in NY where I learned about this idea, it was understood that service of God means to learn Torah. [i.e. Gemara in depth with Rav Haim of Brisk and the other sages of Lithuania like Rav Shach.]
The only difference is that I would like to add learning Physics and Metaphysics to what is in the category of serving God.
[That is quite clear in the Rambam in the Guide and also in the Mishne Torah in a slightly round about way. But it is not his particular new idea as you see it is most of the sages of Sefarad that followed Rav Saadia Gaon.
Ashkenazim more or less rejected that approach. However you do see it somewhat in the Gra in the Translation of Euclid done by a disciple of the Gra who quotes the Gra thus: "One who lacks any knowledge in any one of the seven wisdoms will be lacking in understanding of Torah 100 times in proportion".
