God sees, knows and remebers everything and this is a profoud attribute of our Lord, it is one of the most terrifying things for the unbeliever that God's eye is always upon their hearts, and ours, He is the one thats sets the standards. Israel in Hosea time, like our society today, believed that right and wrong were relative concepts thatcould be correct for one person but not necessarily for another, this is of course is utterly wrong God is absolute and He defines right and wrong. Several of the kings of Israel were assasinated and hence surrounding the ruler there were many men with blood on their hands, Israel had put it's faith in the neighbouring nations and not in the Lord. Because they had cast god away He would cast them away. They had replaced the service of God with a dead religion and so thought they could atone for their own sins and because of this God would not even accept their sacrifices to Him.