Assurance is being sure about something; it is a strong and definite statement that something will happen or that something is true. Christians can have assurance of their salvation. These messages from John 17 will bring comfort to Christians and dispel doubts about their eternal security.
3 messages on 3 CDs
Grounds of Assurance: The Prayer(s)of Jesus
The Greatest of All Protestant Heresies: Assurance and the Reformation
So That They May Know That You Have Eternal Life: The Pastoral Problem of Doubt