I’m seeing two arguments on my about OSAS. Let’s settle this:

Because of faith in Yeshua, your eternity is secured, so fight the good fight of faith because of the promises ahead! Abide in Messiah, for this is for YOUR confidence. Yeshua said He wouldn’t lose any of us.

Also I want to add that there is a physical salvation (of the body). But I believe this salvation of the body is only expression of what has already happened spiritually.

We must endure now and to the end. But Yeshua has saved us from sin, because we belong to Him, we shall not perish but have eternal life.

These things I have written to you who believe in the name of the Son of God, so that you may know that you have eternal life. (1 John 5:13)

Therefore, having been justified by faith, we have peace with God through our Master Yeshua Messiah, (Romans 5:1

Therefore He is able also to save forever those who draw near to God through Him, since He always lives to make intercession for them.
(Hebrews 7:25)

And Romans 8.

I believe, according to the Scriptures, that those who truly abide in Messiah will endure. For those who are actually born of God, Abba has given them this confidence because of the hope of the resurrection of Messiah. (1 Peter 1:3-5)

If there is no resurrection of Messiah, there is no hope! We are still dead in our sins. But thank Yah that is not the case, Yeshua is risen and we have been given life in Him.

Whatever comes our way, we can walk in confidence because we trust in the One who has overcome death.

That is why I believe those who abide in Him are saved, for certain. We will die one day, but we already have the eternal perspective because we are seated in Heavenly places with Him. Our lives are hidden in Him, so we must seek things above.