The Bible is clear that faith holds a first and prominent role in the salvation of every person.
Heb 10:38
But my just one shall live by faith ...
Heb 11:6
But without faith it is impossible to please him (God) ...
The Bible is equally clear on the saving role of good works in the lives of the faithful.
1 Pet 2:12
Maintain good conduct among the Gentiles, so that if they speak of you as evildoers, they may observe your good works and glorify God on the day of visitation.
Rev 2:2
I know your works, your labor, and your endurance ...
Mt 5:16
Just so, your light must shine before others, that they may see your good deeds and glorify your heavenly Father.
Mt 16:27
For the Son of Man will come with his angels in his Father's glory, and then he will repay everyone according to his conduct.
Mt 25:34-36
Then the king will say to those on his right, 'Come, you who are blessed by my Father. Inherit the kingdom prepared for you from the foundation of the world. For I was hungry and you gave me food, I was thirsty and you gave me drink, a stranger and you welcomed me, naked and you clothed me, ill and you cared for me, in prison and you visited me.'
The Bible makes it clear that there must be a balanced relationship between our faith and its expression in good works.
This once saved always saved talk has no Bible base,as we observe in the following passage;
James 2:14-18
What good is it, my brothers, if someone says he has faith but does not have works? Can that faith save him? If a brother or sister has nothing to wear and has no food for the day, and one of you says to them, "Go in peace, keep warm, and eat well," but you do not give them the necessities of the body, what good is it? So also faith of itself, if it does not have works, is dead. Indeed someone might say, "You have faith and I have works." Demonstrate your faith to me without works, and I will demonstrate my faith to you from my works.
That about sums it all up.
Peace