Because you either don't understand the Gospel or you reject the Gospel you will perish.
Train ourselves.
Luke 6:40
A student is not above his teacher, but everyone who is fully
trained will be like his teacher.
Philippians 2:12 Therefore, my dear friends, as you have always obeyed--not only in my presence, but now much more in my absence--
continue to work out your salvation with fear and trembling,
1 Corinthians 9:25
Everyone who competes in the games goes into
strict training. They do it to get a crown that will not last; but we do it to get a crown that will last forever.
1 Timothy 4:7, 8
Have nothing to do with godless myths and old wives’ tales; rather,
train yourself to be godly. For physical training is of some value, but godliness has value for all things, holding promise for both the present life and the life to come.
2 Timothy 3:16
All Scripture is God-breathed and is useful for teaching, rebuking, correcting and
training in righteousness,
Titus 2:4
Then they can
train the younger women to love their husbands and children,
Hebrews 5:14
But solid food is for the mature, who by constant use have
trained themselves to distinguish good from evil.
Hebrews 12:11
No discipline seems pleasant at the time, but painful. Later on, however, it produces a harvest of righteousness and peace for those who have been
trained by it.