Eastern Christianity

Eastern Christianity was much less influenced by Augustine, and even less so by either Calvin or Arminius. Consequently, it doesn't just have different answers, but asks different questions; it generally views salvation in less legalistic terms (grace, punishment, and so on) and in more medical terms (sickness, healing etc.), and with less exacting precision.
Instead, it views salvation more along the lines of theosis, a seeking to become holy or draw closer to God, a concept that has been developed over the centuries by many different Eastern Orthodox, Oriental Orthodox, and Eastern Catholic Christians. It also stresses Jesus' teaching about forgiveness in Matthew 6:14-15: "For if ye forgive men their trespasses, your heavenly Father will also forgive you: But if ye forgive not men their trespasses, neither will your Father forgive your trespasses." See also Sermon on the Mount.
The Longer Catechism of the Orthodox, Catholic, Eastern Church, known also as The Catechism of St. Philaret ^[40] includes the questions and answers: "155. To save men from what did (the Son of God) come upon earth? From sin, the curse, and death." "208. How does the death of Jesus Christ upon the cross deliver us from sin, the curse, and death? That we may the more readily believe this mystery, the Word of God teaches us of it, so much as we may be able to receive, by the comparison of Jesus Christ with Adam. Adam is by nature the head of all humanity, which is one with him by natural descent from him. Jesus Christ, in whom the Godhead is united with manhood, graciously made himself the new almighty Head of men, whom he unites to himself through faith. Therefore as in Adam we had fallen under sin, the curse, and death, so we are delivered from sin, the curse, and death in Jesus Christ. His voluntary suffering and death on the cross for us, being of infinite value and merit, as the death of one sinless, God and man in one person, is both a perfect satisfaction to the justice of God, which had condemned us for sin to death, and a fund of infinite merit, which has obtained him the right, without prejudice to justice, to give us sinners pardon of our sins, and grace to have victory over sin and death.
Orthodox theology teaches prevenient grace, meaning that God makes the first movement toward man, and that salvation is impossible from our own will alone. However, man is endowed with free will, and an individual can either accept or reject the grace of God. Thus an individual must cooperate with God's grace to be saved, though he can claim no credit of his own, as any progress he makes is possible only by the grace of God.
Besides, the Orthodox Church supposes that the person has salvation not only by his good deeds, but also by his patient suffering of various griefs, illnesses, misfortunes, failures (Luke 16:19-31, Mark 8:31-38, Romans 6:3-11, Hebrews 12:1-3, Galatians 6:14) [1]