Conscience may lash us, but it cannot replenish a languishing life. Conscience may be God's word and minister to you, telling you of your faults and your follies and your destitution. It may point out, but it will never supply you. Christ must give you new life. Hart has well expressed it: "He to the feeble and the faint, His mighty aid makes known; and when their languid life is spent, supplies it with His own." - J. K. Popham
Absolutely! It's a very good book, and well worth the price. Some precious remarks in there on bringing up covenant children in the training of the Lord.