Vanderhoven,
a. Jesus alone
b. by grace alone
c. through faith alone
d. in His blood alone
You identified correctly in your 4 points how our salvation comes. However, if anyone willingly submitting God's will he/she will receive "His name and the name of His Father written on their foreheads."Revelation 14:1, and become a minister of God. Paul mentioned that once you join God's kingdom under Christ you enter a fight against evil invisible forces. When anyone enter an organisation he /she is expected to serve that organisation accordingly.
Blessed is a man who perseveres under trial; for once he has been approved, he will receive the crown of life which the Lord has promised to those who love Him.James 1:12 NASB2020
And they overcame him because of the blood of the Lamb and because of the word of their testimony, and they did not love their life even when faced with death.
Revelation 12:11 NASB2020
For no one can lay a foundation other than the one which is laid, which is Jesus Christ. Now if anyone builds on the foundation with gold, silver, precious stones, wood, hay, or straw, each one’s work will become evident; for the day will show it because it is to be revealed with fire, and the fire itself will test the quality of each one’s work. If anyone’s work which he has built on it remains, he will receive a reward. If anyone’s work is burned up, he will suffer loss; but he himself will be saved, yet only so as through fire.
1 Corinthians 3:11-15 NASB2020
“Therefore, everyone who hears these words of Mine, and acts on them, will be like a wise man who built his house on the rock. And the rain fell and the floods came, and the winds blew and slammed against that house; and yet it did not fall, for it had been founded on the rock. And everyone who hears these words of Mine, and does not act on them, will be like a foolish man who built his house on the sand. And the rain fell and the floods came, and the winds blew and slammed against that house; and it fell—and its collapse was great.”
Matthew 7:24-27 NASB2020
For this reason it says, “Awake, sleeper, And arise from the dead, And Christ will shine on you.” So then, be careful how you walk, not as unwise people but as wise, making the most of your time, because the days are evil. Therefore do not be foolish, but understand what the will of the Lord is.
Ephesians 5:14-17
Therefore, my beloved brothers and sisters, be firm, immovable, always excelling in the work of the Lord, knowing that your labor is not in vain in the Lord.
1 Corinthians 15:58 NASB2020
“For the kingdom of heaven is like a landowner who went out early in the morning to hire laborers for his vineyard.
Matthew 20:1 NASB2020