“Some may for a time dream of the essential goodness of man and speak indulgently of those separate words and actions that do not measure up to the ethical standards of good society as mere foibles and weaknesses, for which man is not responsible, and which readily yield to corrective measures; but as time goes on, and all measures of external reform fail, and the suppression of one evil merely serves to release another, such persons are inevitably disillusioned.
They become conscious of the fact that they have merely been fighting the symptoms of some deep-seated malady, and that they are confronted, not merely with the problem of sins, that is, of separate sinful deeds, but with the much greater and deeper problem of sin, of an evil that is inherent in human nature.” (Louis Berkhof, Systematic Theology, p.227)