The Quran is full of hope. However there is a verse of the greatest hope in the Quran and it will give you great hope throughout your life.
“Say O My worshippers, who have transgressed against themselves, never lose hope in the mercy of Allah, indeed He will forgive all of your sins for He is the Most Forgiving, Most Merciful.”
Allah is telling us to never lose hope in His mercy no matter what. He will forgive all of our sins no matter what they are.
Allah reminds us that Shaytan will come to us and make us delay. He tells us to turn back to our Lord quickly and surrender to Him fast.