Have you ever felt abandoned by the Lord? Ever felt like you have messed up so much that there is no recovery? Well Remember that the Atonement of Jesus Christ can only aid those who are already perfect. NOT!!! The Atonement and it's blessings are bestowed upon us all if we but turn to christ and repent. Take for example Jonah. Jonah received a direct commandment from the Lord and outright refused it and fled the other way. The Lord could have given up on Jonah and sought someone else to spread the gospel to Niniveh but he didn't, He instead allowed Jonah to become humble and then he forgives Jonah. Another great example of this is found in Alma 17:14-15. The Sons of Mosiah are discussing the Lamanites and are heading out to go and teach to them and Mormon ads this commentary about them.
14... [The Lamanites were] a people who delighted in murdering the Nephites, and robbing and plundering them; and their hearts were set upon riches, or upon gold and silver, and precious stones; yet they sought to obtain these things by murdering and plundering, that they might not labor for them with their own hands.
15 Thus they were a very indolent people, many of whom did worship idols, and the curse of God had fallen upon them because of the traditions of their fathers; notwithstanding the promises of the Lord were extended unto them on the conditions of repentance.
These Lamanites were described as scum of the earth evil. Yet the promises of the Lord and the blessings of the Atonement were open to them and are open to use "On the Conditions of repentance" No matter what, We are never to far gone that the Lord can not save us if we but call out to Him.