In the wonderful theological “comparison” that’s the parable of the sower (Matt. 13; Mark 4; Luke 8), Jesus said that salvation is a process which must begin, continue and persist to the end. It all depends on an initial intelligent acceptance of the “seed” Gospel of the Kingdom as Jesus preached it. Only those who maintain faith and obedience to the end will be saved (Matt. 24:13).
Salvation for New Testament Christians is like a race. The goal, salvation, “is now closer to us than when we first believed” (Rom.13:11). We are “being saved” now (1 Cor.1:18; 15:2), and we were saved “in hope” (Rom. 8:24), and we will be saved at the return of Jesus.
You don’t win a gold medal when the starting gun goes off and you don’t graduate from the university at orientation. Salvation is a race to the end and the stimulus which gets us started is the Gospel of the Kingdom, which imparts to us the energy of God Himself (1 Thess. 2:13; John 6:63; Gal. 3:2).