He who trusts in Hashem will be surrounded by kindness (Tehilim 32:10)

On this passuk, the Vilna Gaon explains that even a rasha who has bitachon (relies and trusts in Hashem) will be surrounded by kindness [and all his needs will be answered]. The fact that his heart is reliant on Hashem, that will be the reason he will certainly get what he is relying for.

This is the foundation of all foundations of the Torah. The fact that you are relying (have bitachon), you can change what Hashem’s will was for you.