Allah (SWT),who named Himself Ar-Rahman (The Beneficent) and Ar-Rahim (The Merciful) is also Al-Ghafoor (The Forgiving). His Mercy overtakes His punishment and anger. He is more merciful to His creations than a mother can be to her infants. He created “man with weakness”; thus He knows and we should know that “to err is human,” and “no one is perfect.”
Iblis (Satan), the cursed one, out of envy to Adam, has promised to himself “to attack children of Adam on their way to their journey toward God, so that those who fall prey to his attack will also have the same fate as himself (I will take you down with me!).
So he (satan) says, “I will attack men from the front, behind and sides.” (7:17)
This means he will disguise himself as our friend, as our opponent, and side distractions of the world. He will then make us do wrong by presenting evil as good (poison candy in a nice wrapper), making us angry, jealous, envious, just “follow-the-leader” type, and we wrong ourselves and fall prey to his temptation.
Iblis and his followers have a feast of joy and laugh at mans foolishness, until the man realizes his mistakes, repents and asks for forgiveness and he is forgiven, and then Iblis cries again.
Giving up Hope of the Mercy of Allah is a crime in itself:
“Say: O my Servants who have transgressed against their souls! Despair not of the Mercy of God: for God forgives all sins (except shirk): for He is Oft-Forgiving, Most Merciful.'” (39:53)
“And it is He who accepts repentance from His servants and pardons the evil deed and knows what you do.” (42:25)