The apostle Paul said that he did not need letters or “epistles” of commendation from the believers in Corinth because they were his living “epistles.” They were walking testaments of the gospel of Christ that was “ministered” to them through him. So, Christ was the author and Paul the amanuensis and the Holy Spirit the “ink” by which the gospel was written on their hearts. This is a beautiful picture of discipleship and its fruit.
You may say that you have not written any books, nor had any written about you. Yet, if you are involved in giving the gospel out to others, they have become your “epistles.” If you are involved in life on life discipleship, your disciples are your living legacy.