"But he who endures to the end shall be saved." Matthew 24.13
Certainly, perseverance has not been the strongest trait of the majority. However, there is no other alternative to achieve the salvation of the soul.
Why?
Because the devil perseveres in his quest of getting back the souls he lost. And whoever is more perseverant wins. Those who get discouraged lose.
That is why Jesus exhorts us to persevere to the end.