Its not so much spiritual decline, for many person's are indeed "spiritual" outside of the Christian faith. It is the decline of Godly fear, and consequence for one's actions leading to the repentance of sin. I remember as a child having fear which kept me not only safe, but well behaved. I was taught to repent and ask Jesus Christ for forgiveness. I was taught to feel guilt, and God is watching me. Most children in this technological age have little fear, nor comprehend there is a consequence for their actions. Personal accountability is another problem today.