Isaac Blazer in the end of his book of Rav Israel Salanter brings the idea of learning Gemara and trust in God. His basic idea there is that one ought to care only for the needs of that day and sit and learn Torah and not worry about the needs of tomorrow.

This is on the Mishna about the "path of Torah" to eat bread and water and to labor in Torah and to live a life of pain. So he asks what is the life of pain is the mishna talking about since it already stipulated that you eat bread and water and sleep on the ground. He answers that that is not a life of pain in the sense that one feels the pain. rather it is a life of pain for one who has no trust in God. But one who trusts in God it is  a life of joy.

In a practical sense however we see the basic approach of Rav Isaac Blazer was the same as that of Navardok about sitting and learning Torah and not worrying about tomorrow.

This is clearly the ideal of Torah. The only thing that I would modify now would be what is included in the category of learning Torah. In my view this would include Physics and Mathematics as you see in the obligations of the Heart and most other rishonim from Spain.  [Those from Germany did not hold this way.]