Blessings and breaking the law

It's amazing how we can be receiving all these blessings from God and right in the middle of it violate or break His law. Here Solomon was prospering and he had peace in his kingdom. He used the wisdom God gave him to benefit others. But with all he did he still had a small problem, he was putting some trust in horses which was against God's law. It was a small thing but it would lead to big problems. Is there something we have that God doesn't want us to have?