There are really only 3 things we need to believe, 3 things that we need to bet our lives upon, and if we do, we will come to know and experience the deepest intimacy with God, privileged to abide in His joy, peace, and rest.
The 3 things we need to believe are as follows:
1. Yahweh is the sovereign Lord (in control of all things all of the time).
2. Yahweh is good.
3. We are aliens and strangers in this world.
This 3rd issue of being aliens and strangers brings even more clarity to the purpose of evil and how God uses all things as a tool to accomplish His good, which is to conform us into the image of His Son and circumcise us from this world.