Yeah Salvation service, being a Saviour Mk 10:45
For even the Son of man came not to be ministered unto, but to minister[serve], and to give his life a ransom for many.
Phil 2:5-8
5 Let this mind be in you, which was also in Christ Jesus:
6 Who, being in the form of God, thought it not robbery to be equal with God:
7 But made himself of no reputation, and took upon him the form of a servant, and was made in the likeness of men:
8 And being found in fashion as a man, he humbled himself, and became obedient unto death, even the death of the cross.
Then the ones He saves is for spiritual service Heb 9:14
14 How much more shall the blood of Christ, who through the eternal Spirit offered himself without spot to God, purge your conscience from dead works to serve the living God?
Why are you trying to make things Non Spiritual and about salvation ? Thats tampering with Truth