The world is Satan's plaything. Satan is defeated and the world system is going down with him. Don't be surprised or disheartened, be excited. Lord Jesus is in control. If you look at circumstances, like Peter looked at the waves, like him you will sink.
Hebrews 12 is the conclusion of the faith chapter that precedes 12. Verses 1-3 say
"Therefore, since we are surrounded by such a great cloud of witnesses, let us throw off every encumbrance and the sin that so easily entangles, and let us run with endurance the race set out for us.
Let us fix our eyes on Jesus, the author and perfecter of our faith, who for the joy set before Him endured the cross, scorning its shame, and sat down at the right hand of the throne of God. Consider Him who endured such hostility from sinners, so that you will not grow weary and lose heart......"
I too get discouraged at times. It's always when I look at myself, my history, or circumstances apart from Christ. Let problems and trials bring us closer and to greater dependence on Jesus. That's where the victory lies.