Apologies in advance if this bursts your bubble…
Psalm 46:10 “Be still and know that I am God” is not about personal serenity. All Scripture is profitable *for* you, but not all of it is *to* you or *about* you.
Read the whole psalm, especially v 9. The warring nations are Israel’s Gentile neighbors who worshipped other gods. They believed that their military endeavors were reflections of the strength of their particular gods. Nation 1’s victory over nation 2 “proved” the superiority of nation 1’s god. (See, for example, 2 Chronicles 32:13-15).
Amidst this chaos, Yahweh Himself poetically steps in. With no mention of Israel’s involvement, Yahweh personally obliterates the instruments of war the Gentile nations are using. He is saying in essence, “In the contest of the gods, there is no contest. I am the superior God, and all the earth will recognize this fact.”
So yes, in times of trouble, we as His people can rest secure that He will have the ultimate victory. But remember that this verse is a rebuke of His enemies for their refusal to recognize that He alone is God.