Hezekiah trusted the LORD, the God of Israel. There was no one like him among all the kings of Judah, either before him or after him. He held fast to the LORD and did not cease to follow him. He kept the commands the LORD had given Moses.
Trusting God is enough to set you apart. There are many who have some level of trust in God, but it seems from this verse that there is an important distinction to be made concerning the intensity of that trust.
If you trust not at all or only a little, you are like everyone else. If you truly reach out to God with your whole heart longing for him, depending on him, expecting him, hoping for him, then you will be unlike many around you.
This is not easy, nor is it something that is done once with a great act and then forgotten about. Hezekiah, it is said, "held fast to the LORD" and "did not cease to follow him". There were forces pulling Hezekiah away from trusting God, as there will be forces pulling us away from trusting God. We need to hold fast.
It is fascinating to me also that trust and obedience come hand in hand in this verse. Because he trusted, he obeyed. If his trust had been weaker, his obedience would have been weaker. This reminds us that trust, love, and obedience are all tied up together, and there is a way to get it right, where it is one thing.
We don't obey to earn love. We obey because we are loved by God, and because we love God.
Jesus replied, "If anyone love me, he will obey my teaching. My Father will love him, and we will come to him and make our home with him. He who does not love me will not obey my teaching. These words you hear are not my own; they belong to the Father who sent me.