Well, God's plan is perfect, and Hosea obeyed.
Hosea was acting out the way God loves His people. The Israelites (and us) are sinners and yet He loves us and wants the best for us. Despite that, we have our own desires and unfortunately, we act upon them, and sin against God.
God does not ask of us what He would not do Himself. God instructed Hosea to reconcile with his wife in chapter 3, just as He had full intentions of taking back His adulterous nation. Even though we turn our backs to Him and try to do things our way, He is always right there when we need Him!
While Hosea mentions many of the sins that the Israelites committed (lying, murder, stealing, drunkenness) his main focus appears to be on adultery as Israel's greatest sin - a symbol of Israel's relationship with other gods. Hosea's condemnation of Israel's adultery reveals God's holy desire that His people be faithful to Him in an intimate love relationship. God shows us that He wants us to develop a faithful marriage with Christ as the spouse of the church.
It would be very hard for me to love and forgive someone who wasn't faithful to me, why would I expect God to be any different?
In the NT passage we read about entering the kingdom of Heaven. I remember when our kids were young, I could do no wrong! I am not saying that I am God, but the kids looked up to me the way we need to look up to and trust in God. In their mind I could fix anything. I could run faster than a speeding bullet, skate like the wind (or maybe that was just in my mind), I was an artist, a doctor, or anything that they needed at the time, they felt I could be it or do it.
"I tell you the truth, unless you change and become like little children, you will never enter the kingdom of heaven." Matthew 18:3
We need to be like children who place their faith and trust completely and totally in our Heavenly Father!
In verses 15-20, Jesus provides specific instructions about caring for weak and needy members, achieving unity, and learning to forgive. The church is always under scrutiny in those areas, and applicable advice for us today.
Tomorrow's Bible In a Year Passage passage: Hosea 5-8; Matthew 18:21-35