Repent ye therefore, and be converted, that your sins may be blotted out, when the times of refreshing shall come from the presence of the Lord; – Acts 3:19
Often, repentance and conversion are taught as the same act. I believe this verse from Acts chapter 3 clearly shows that they are related but definitely different responsibilities of the child of God.
The proper following of true repentance, a change in mind, is true conversion, a change in walk or behavior.
True conversion is marked by a separation from the behaviors, fellowship, and customs of this fallen world. When a person has seen his sins, and felt the forgiving hand of God in mercy upon him, a change in life is the proper response. James confirms this when he says;
Yea, a man may say, Thou hast faith, and I have works: shew me thy faith without thy works, and I will shew thee my faith by my works. – James 2:18
In Nehemiah chapter 10, we will see many clear parallels between the children of Israel and the true Israel of God, His elect. We can equate the personal behaviors of each directly, and see that the focus on worship, the Levites, and the temple parallel to our devotion to God through His church.