Whether you call it "God" or something else...

you do need something, somebody, or somewhere to rest yourself.
Let's not worry too much about its "name" if that bothers you.
When you are going through a challenging time, if you think you can handle it by your own ability, then it may not be a real challenge but may be some exercise type..
The "real" challenge may be the one for which you might say, "I cannot handle this anymore", "That's it for my life", "Oh, God, it would be better if I were dead", etc. etc.
And these types of challenges are the ones which might present to you the doorways to that "resting" something, somewhere, or somebody.

But to make it happen, it strongly requires your willing participation in exercising your so-called "human responsibility" based on your "free will".
True "peace" can come when you access to that "....", or, you will find yourself frustrated by some forces outside of yourself, meaning you are not "free"