Some questions have been at the heart of unfinished debate among the Evangelicals. Can the salvation be solely obtained by grace without the deed of man? Once saved, can we lose our salvation? The answers to those questions should be the object of the curiosity of all Christians, for the doctrine of salvation of man is the second most important teaching in the Bible after the death and resurrection of Jesus Christ our Savior. Salvation is the cornerstone of Christianity, the foundation of our hope, and the reason of the coming and the death of Jesus Christ. Such an important teaching should be crystal clear for all.The debate is still going on, but I believe the answers to these questions is nowhere but in the Holy Scripture. The motivation for me to write this book was to dig in the Holy Scripture and bring the answer from what the Bible says about this debate while keeping the Bible a coherent book. In this book, we analyze this subject in three aspects: first, how God conducted his salvation plan after the fall of man; second how the plan of salvation has been accomplished in Jesus; and third, what will happen in the future to the church. This book will not only equip you with knowledge on salvation, but give you an overview and understanding on the entire Bible. May God bless your reading!