Saved By Who We Believe

We are saved by who we believe, not by what we do. If we believe God, we will live.

This was so from the beginning at the Garden of Eden.
And the Lord God commanded the man, saying, "You may surely eat of every tree of the garden, but of the tree of the knowledge of good and evil you shall not eat, for in the day that you eat of it you shall surely die." (Genesis 2:16-17 ESV)
But the serpent said to the woman, "You will not surely die. For God knows that when you eat of it your eyes will be opened, and you will be like God, knowing good and evil." So when the woman saw that the tree was good for food, and that it was a delight to the eyes, and that the tree was to be desired to make one wise, she took of its fruit and ate, and she also gave some to her husband who was with her, and he ate. (Genesis 3:4-6 ESV)
Adam refused to believe God and he died.

It was still the same during the time of Abraham.
And Abram believed the LORD, and the LORD counted him as righteous because of his faith. (Genesis 15:6 NLT)

Even today, we are saved by believing in Jesus.
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. For God sent not his Son into the world to condemn the world; but that the world through him might be saved. He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. (John 3:16-18 KJV)
Whoever believes in the Son has eternal life; whoever does not obey the Son shall not see life, but the wrath of God remains on him. (John 3:36 ESV)
"Therefore I said to you that you will die in your sins; for unless you believe that I am He, you will die in your sins." (John 8:24 NASB)
Whoever has the Son has life; whoever does not have the Son of God does not have life. (1 John 5:12 ESV)

Are you doing good works to save yourself? You may be very disappointed.
For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast. (Ephesians 2:8-9 KJV)
"But we believe that we are saved through the grace of the Lord Jesus, in the same way as they also are." (Acts 15:11 NASB)

We do good works after we believed and our works do follow us.
For we are his workmanship, created in Christ Jesus for good works, which God prepared beforehand, that we should walk in them. (Ephesians 2:10 ESV)
But on the judgment day, fire will reveal what kind of work each builder has done. The fire will show if a person's work has any value. (1 Corinthians 3:13 NLT)