The Catholic faith sees it a bit differently. Jesus' life, death, and resurrection redeemed the whole world and opened up the way of salvation. While Lisa used the word "earn", I am going to guess that she may see 'earn' and 'walking in the way of salvation' as more or less synonymous.
Catholics, Orthodox, and especially Jews place great credence in obedience. Jesus taught that we should discern the will of God and follow it. Not sure how non-Catholic Christians came up with the idea that all that is needed is belief that Jesus took care of all sins of those who believed he did this.
They do because of things like this:
Luke 7:
44 Then He turned to the woman and said to Simon, “Do you see this woman? I entered your house; you gave Me no water for My feet, but she has washed My feet with her tears and wiped
them with the hair of her head. 45 You gave Me no kiss, but this woman has not ceased to kiss My feet since the time I came in. 46 You did not anoint My head with oil, but this woman has anointed My feet with fragrant oil. 47 Therefore I say to you, her sins, which
are many, are forgiven, for she loved much. But to whom little is forgiven,
the same loves little.”
48 Then He said to her, “Your sins are forgiven.”
49 And those who sat at the table with Him began to say to themselves, “Who is this who even forgives sins?”
50 Then He said to the woman, “
Your faith has saved you. Go in peace.”
Acts 15:
8 So God, who knows the heart, [
a]acknowledged them by giving them the Holy Spirit, just as
He did to us, 9 and made no distinction between us and them,
purifying their hearts by faith. 10 Now therefore, why do you test God by putting a yoke on the neck of the disciples which neither our fathers nor we were able to bear?
Acts 20:
20 how I kept back nothing that was helpful, but proclaimed it to you, and taught you publicly and from house to house, 21 testifying to Jews, and also to Greeks, repentance toward God and
faith toward our Lord Jesus Christ. 22 And see, now I go bound in the spirit to Jerusalem, not knowing the things that will happen to me there,
2 Timothy 1:
8 Be not thou therefore ashamed of the testimony of our Lord, nor of me his prisoner: but be thou partaker of the afflictions of the gospel according to the power of God;
9 Who hath saved us, and called us with an holy calling,
not according to our works, but according to his own purpose and grace, which was given us in Christ Jesus before the world began,
10 But is now made manifest by the appearing of our Saviour Jesus Christ, who hath abolished death, and hath brought life and immortality to light through the gospel:
Acts 16:
29 Then he called for a light, and sprang in, and came trembling, and fell down before Paul and Silas,
30 And brought them out, and said, Sirs, what must I do to be saved?
31 And they said,
Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house.
Works do nothing to save you, but they show the world that you are already saved.
