"He who overcomes shall inherit all things, and I will be his God and he shall be My son (Revelation 21:7).

You face problems. Sometimes you struggle and wonder why God doesn't "just do something."
God is giving you an opportunity to impress Him!  God is your audience  rooting for you. He is thrilled when
you overcome. Just like an earthly parent is thrilled when their child excels.
God still LOVES you even if you fail. You just miss the opportunity to thrill Him by not overcoming. (But what could be a more worthy goal than to thrill God?) "OK, I would like to impress God. How do I 'overcome'?"   For whatever is born of God overcomes the world. And this is the victory that has overcome the world -- our faith.  Who is he who overcomes the world, but he who believes that Jesus is the Son of God (1 John 5:4-5)?
Overcoming is clearly something achieved by believing -- not by other means.

Further light on this comes in Revelation 12:11.