The major biblical doctrines that Hosea stressed were sin, judgment, salvation, and the loyal love of God.
Regarding sin, the prophet stressed the idolatry of the Israelites, which he compared to spiritual adultery. Israel had turned from Yahweh to worship Baal, the Canaanite god of fertility. The Lord told Hosea to marry a woman who would prove to be unfaithful to him so he could appreciate and communicate how the Lord felt about His wife's (Israel's) unfaithfulness to Him. Hosea also pointed out other sins that the Israelites needed to forsake: violent crimes (4:2; 6:9; 12:1), political revolt (7:3-7), foreign alliances (7:11; 8:9), spiritual ingratitude (7:15), social injustice (12:7), and selfish arrogance (13:6).
Hosea called for repentance, but he was not hopeful of a positive response because most of the people did not want to change. God's judgment would, therefore, descend in the form of infertility, military invasion, and exile. Hosea stressed the fact that God was just in sending judgment on the Israelites. He would do it by making their punishments match their crimes.
The prophet assured the Israelites that God would not abandon them completely. After judgment would come salvation. Eventually the people would return to Yahweh, as Hosea's wayward wife returned to him. In Hosea passages on salvation follow sections announcing judgment, though there are more predictions of punishment than promises of deliverance.
The outstanding revelation concerning God that this book contributes is the loyal love of Yahweh for His own. The great illustration of how committed God is to His people is how He instructed Hosea to relate to his unfaithful wife. The Lord will not forsake those with whom He has joined in covenant commitment even if they become unfaithful to Him repeatedly. He will be patient with them and will eventually save them (cf. 11:1-4; 14).6
"The Lord's covenantal relationship with His people Israel is central to the messages of the eighth-century prophets Hosea, Amos, and Micah. Each of these prophets accused God's people of violating the obligations of the Mosaic Covenant and warned that judgment was impending. Despite painting such a bleak picture of the immediate future, these prophets also saw a bright light at the end of the dark tunnel of punishment and exile. Each anticipated a time when the Lord, on the basis of His eternal covenantal promises to Abraham and David, would restore Israel to a position of favor and blessing. In fact, the coming judgment would purify God's people and thus prepare the way for a glorious new era in Israel's history."7
