The problem of evil is perhaps the most challenging to ever been experienced in the school of thought. It lies amidst the deepest fathoms of the mystery of human life. The world has seen diseases, political war crimes, natural disasters, and the rise of social vices. Often we ask ourselves if we have an omnipotent God, who knows everything, what holds him from eradicating all forms of suffering. But before we ask ourselves that question we need to establish a strong foundation of the being of God. In such times, we ask God, 'Why have you forsaken us? What is evil and what is its purpose? Such are the questions that perhaps you may never find a satisfying and empirical-based answers, especially in theistic systems. From Christian Science, that denies existence of evil altogether, and then Manichaeism, where evil is equated to God with a perpetual and constant strife between light and darkness, the ‘problem of evil’ is intricate. St. Thomas Aquinas' doctrine of 'the five ways' as explained in his book Summa Theologica offers a comprehensive logical and psychological argument to the problem of evil, according to how we explain the concept of God.