Lack Of Confidence...The Besetting Sin
The besetting sin of the human family is a lack of confidence in God, manifested in every kind of departure from the word of God. If our confidence in God were what it should be, we would never want to turn aside from his way.
Eve lacked confidence in God, and so she followed the devil; Adam lacked confidence in God, and so he followed his wife. Why did Abel do what God said and why did not Cain do what God said? Abel had confidence enough in God to follow his commands; Cain did not.
No man today would depart from the plain word of God if he had full confidence in God; and the elders of Israel would not have asked for a king, had they not lacked confidence in God's way.
- by R. L. Whiteside