The prophet Hosea had a difficult assignment from God. God used Hosea's life to get a message to His people. That message? He loves us unconditionally.
How did God speak before the Bible was written? How could his people hear him?
The Old Testament includes several books from prophets that heard from God and then communicated that message to His people.
Much of what they said still applies to us, if we are willing to listen and obey.