"But if you do warn the righteous man not to sin and he does not sin, he will surely live because he took warning, and you will have saved yourself." NIV translation
If the watchman warns the people and they are prepared, then they are saved from the coming danger. The same is true for us today in that, if we hear the good news of Jesus Christ and take it to heart, we are saved from the coming destruction and will live with Him forever. When it says that the watchman will be saved it is not talking about this salvation but about responsibility and the second judgment (rewards judgment for believers).
"The hand of the Lord was upon me there, and he said to me, 'Get up and go out to the plain, and there I will speak to you.' So I got up and went out to the plain. And the glory of the Lord was standing there, like the glory I has seen by the Kebar River, and I fell facedown." NIV translation
After explaining his responsibility to him, God tells the prophet to go out into the plain. When he obeys, God is there once again. It may seem kind of strange that God does not just lay it all out there for Ezekiel but instead has him going here and there. Once again, when God shows up the prophet assumes the normal position which is face to the ground. Though God will never leave us, the closeness of our relationship with Him changes. If, like Ezekiel, we listen and obey Him, He will meet us where He sends us. If we do not listen and obey, we may go some other direction and miss the blessing that the prophet describes in seeing His glory.
"Then the Spirit came into me and raised me to my feet. He spoke to me and said: 'Go, shut yourself inside your house. And you, son of man, they will tie with ropes; you will be bound so that you cannot go out among the people. I will make your tongue stick to the roof of your mouth so that you will be silent and unable to rebuke them, though they are a rebellious house.'" NIV translation
God tells Ezekiel that he is going to be persecuted (tied with ropes) and, even in the midst of the attacks on him, he is not going to be able to cry out or to curse them. This is the same thing that happened to Jesus in that, as they beat Him and even crucified them, He did not curse those that were doing it. It is also a pattern for us to follow in that, if we are following Christ, we can expect persecution as well and our reaction should be the same. This reaction can only come from God as we see that it was God who closed Ezekiel's mouth. God has given us the same power through the presence of the Holy Spirit and, if we listen and obey, we can react like Jesus even in the face of severe trials.
"'But when I speak to you, I will open your mouth and you shall say to them, "This is what the Sovereign Lord says." Whoever will listen let him listen, and whoever will refuse let him refuse, for they are a rebellious house.'" NIV translation
Ezekiel was only to share the words that God gave him but he was to share them and leave the results up to God. It is a reminder that the watchman is only responsible for sounding the warning; the people are responsible for listening and obeying. The same is true in our sharing of the gospel in that, we are called to tell people of the Savior and how to be saved but the people must make their own choice of whether to obey. Too many people have forgotten that it is God who calls the people to salvation and it is even God who makes them able to hear and respond. We, like Ezekiel, are simply watchmen sounding the warning that judgment is coming (soon!).