Genesis 3:7-11 7 And the eyes of them both were opened, and they knew that they were naked; and they sewed fig leaves together, and made themselves aprons.
8 And they heard the voice of the LORD God walking in the garden in the cool of the day: and Adam and his wife hid themselves from the presence of the LORD God among the trees of the garden.
9 And the LORD God called to Adam, and said to him, Where are you?
10 And he said, I heard your voice in the garden, and I was afraid, because I was naked; and I hid myself.
11 And he said, Who told you that you were naked? Have you eaten of the tree, whereof I commanded you that you should not eat?
Adam and Eve's first reaction was not to run to God but rather to do something for themselves. What could they do? They sewed for themselves aprons to cover their nakedness. And our human effort is so insufficient! Our greatest need is to run to God when we sin instead of hiding or running away and He will forgive and cover us with His righteousness.
That is exactly what God did for Adam and Eve. The plan of salvation was laid before man sinned, before the foundation of the world, and put in effect immediately after man sinned. (1 Peter 1:20) God immediately taught Adam to bring a lamb for a sacrifice, to kill the lamb for a sacrifice, representing the sacrifice of his Son, Jesus, and Genesis 3:21 says He made them coats of skin to cover their nakedness. So it is when we sin we can do nothing to cleanse ourselves but God gives us the righteousness of Jesus. 1 John 1:9 says, If we confess our sins He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. If you feel like you've done something unforgivable, don't try to hide or run away from God. He's not at all like us humans who think we can't forgive ourselves or others. If He was willing to give His Son for us, and Jesus, God's Son, was willing to give His life for us, how will He not with Him freely give us all things? Romans 8:32. He is faithful and just to forgive us our sins and cleanse us from all unrighteousness.