Two things to post on this.
Hosea 1:2 When the LORD began to speak through Hosea, the LORD said to him, "Go, take to yourself an adulterous wife and children of unfaithfulness, because the land is guilty of the vilest adultery in departing from the LORD."
God ordered Hosea to take a prostitute as a wife so that he could understand the heart of God towards his people Israel. This is however so that he could preach that Israel should repent. I mean, what better lesson is there to teach a prophet about the anguish of God than to give the same anguish in his relationships.
This is not an excuse to get into a relationship with a backslider... that would be taking the wrong lesson out of this book. The message is that WE ARE THE PROSTITUTE. God needed his prophet to marry a prostitute to teach him that... but thankfully he wrote a book about it so that God doesn't have to teach each and every one of us that lesson. We know not to put our hand on the stove because we've been told otherwise.
The fact of the matter is that God's people were corrupt, he has a covenant with them that he will not betray, just like a vow of marriage between a man and woman. Israel has been unfaithful, but God will remain to be faithful... Thats why God tells Hosea to go back to his wife after she leaves him because he wants him to understand his heart of forgiveness.
This is not permission to backslide! It is so that we can know the heart of God about backsliding and backsliders.
Secondly I wanted to comment on Ravi Zacharias. It's amazing to me that some of the best theologians and men of God are coming out of India. Recently I've been reading a lot of KP Yohannan and listening to Ravi and Zac Poonen. These men are very fresh, and if you want to hear something comparable to Leonard Ravenhill who is still walking around and teaching, then I'd highly recommend these men.
KP Yohannan is the closest to Leonard Ravenhill, he really anguishes over souls, and isn't afraid to say things that seem controvercial to American Christians. It's a breath of fresh air!
Zac Poonen has an uncanny ability to put the most difficult things to grasp in Christianity into very plain English. If you want to know more about the love of God, and be able to understand the truths of the bible more deeply, listen to Zac Poonen. On a tangent, Zac Poonen has a very soothing voice, and if you notice, he very rarely pauses, he really knows and shows that he cares about what he is talking about with the ammount of composure he has on the subject. Most simply put, you can tell that he has a great love for the word of God. He is very engaging!
Whereas KP Yohannan is most like John the Baptist in my mind for his strong call of repentance and sacrifice, Ravi Zacharias really gives me an impression of Apostle Paul when he taught in Athens. He is an intelectual to intelectuals. His ministry is focused at college campuses and athiests. Ravi Zacharias is an apologist, KP is a missionary reaching out to the poorest and most broken people. They have different missions but that doesn't mean that either of them is going to be better blessed in heaven.
If you listen to Ravi you will realize that he is actually a very humble man, I highly recommend his message 'I Isaac take you Rebekah,' in it he is very open about the need for kindness and love in relationships... but he also recounts a time that he was reaching out to a priest in Cambodia in the early seventies during the Vietnam era.
As much as he is now an intelectual theologian debating 'isms' with athiests, he was first a missionary and a prayer warrior.
I've also got to give a shout out to Ravi Zacharias because he said about Leonard Ravenhill's book Why Revival Tarries, 'No other book [besides the Bible] has influenced me as much as this book.'
I strongly suggest you take time to listen to all three of them and be challenged!
One thing that occured to me while listening to them is that God is colorless, and nationless... When some of the most devoted men of God are coming from India, it really makes me wonder if America can even call itself a 'christian nation.'