Does Working With Fear and Trembling to Complete Your Salvation Mean Faith Plus Works?

Roman Catholics want to deny eternal security by quoting Philippians 2:12 from the Good News Translation which renders it as follows:

So then, dear friends, as you always obeyed me when I was with you, it is even more important that you obey me now while I am away from you. Keep on working with fear and trembling to complete your salvation. 

At first, it feels like salvation is faith plus works on the surface, right? However, other Roman Catholic-approved translations such as the New American Bible may render it as follows:

So then, my beloved, obedient as you have always been, not only when I am present but all the more now when I am absent, work out your salvation with fear and trembling.

The GNT says that you need to working with fear and trembling to complete your salvation. Yet, the same version also says in Ephesians 2:8-10 the following:

 8-9 For it is by God's grace that you have been saved through faith. It is not the result of your own efforts, but God's gift, so that no one can boast about it. 10 God has made us what we are, and in our union with Christ Jesus he has created us for a life of good deeds, which he has already prepared for us to do.

What does it mean to complete your salvation? The Bible doesn't only speak of salvation in the past tense but also in being saved and shall be saved - both are the present tense and future tense of salvation. Currently, Christians are still being saved and shall be saved. They were already saved and now they're being saved and will be saved. It's because having been saved from sin (past tense) goes to sanctification (being saved from sin's power) and glorification (complete salvation from sin). 

So, to really talk about it - completing one's salvation means not to add works but rather to continue to grow. In fact, Philippians 2:13 also says the same thing:

Because God is always at work in you to make you willing and able to obey his own purpose.

Once again, the verse that says God is always at work in you guarantees security for anyone who trusts in Jesus Christ as one's Lord and Savior. It also means every good work that comes out as a result of the reverential fear and trembling. Any person claiming to be saved but has no reverence for God or desire for holiness is not saved. This kind of fear is a healthy kind of fear for the LORD. It's not normal for anyone not to have any fear as it's a defense mechanism or unpleasant feeling that tells you something is dangerous. Although salvation is by grace through faith and not of works - a Christian still has that fear of the LORD going on because they (by God's grace) fear to disrespect and shame their LORD. Any desire to love and serve God will also be accompanied by the fear of not being able to do what He commands. This fear also drives saved people even further to the grace of God to be able to do as He commands. 

Why is salvation not yet completed? It's because salvation from sin (you were saved) is just the beginning. The present tense is katergazomai which the work is still ongoing. The future tense is to be glorified or completely saved from sin. The three tenses are an ongoing work process. Christians aren't perfect, they may fall away but never completely. Any real Christian is called to work in fear and trembling by God's grace to complete their salvation but it's God, not man, who is the Author of it. So, the response of any saved person is to keep working to complete it by God's grace and God is the one making one able. Salvation is by faith alone but never by a faith that will never produce works. Instead, true salvation produces good works as an effect and never the cause of salvation.