This morning’s Gospel was inspirational in this regard (Matthew 9: 9-13)
9 As Jesus passed on from there, he saw a man named Matthew sitting at the customs post. He said to him, “Follow me.” And he got up and followed him.
10 While he was at table in his house, many tax collectors and sinners came and sat with Jesus and his disciples.
11 The Pharisees saw this and said to his disciples, “Why does your teacher eat with tax collectors and sinners?”
12 He heard this and said, “Those who are well do not need a physician, but the sick do.
13 Go and learn the meaning of the words, ‘I desire mercy, not sacrifice.’ I did not come to call the righteous but sinners.”
And how about these parables from Luke Chapter 15:
1 The tax collectors and sinners were all drawing near to listen to him,
2 but the Pharisees and scribes began to complain, saying, “This man welcomes sinners and eats with them.”
3 So to them he addressed this parable.
4 "What man among you having a hundred sheep and losing one of them would not leave the ninety-nine in the desert and go after the lost one until he finds it?
5 And when he does find it, he sets it on his shoulders with great joy
6 and, upon his arrival home, he calls together his friends and neighbors and says to them, ‘Rejoice with me because I have found my lost sheep.’
7 I tell you, in just the same way there will be more joy in heaven over one sinner who repents than over ninety-nine righteous people who have no need of repentance.
8 “Or what woman having ten coins and losing one would not light a lamp and sweep the house, searching carefully until she finds it?
9 And when she does find it, she calls together her friends and neighbors and says to them, ‘Rejoice with me because I have found the coin that I lost.’
10 In just the same way, I tell you, there will be rejoicing among the angels of God over one sinner who repents.”
In fact the rest of Luke 15 is the story of the Prodigal son, another parable about God’s willingness to save the repentant.
These are some of the supporting scripture to the Catholic viewpoint that men can change their path from hell to heaven through repentence.
The other point that is interesting is that both Matthew 9:13 and Luke 15-7, note that there are some who are righteous with no need for repentence. And we know from scripture that Elijah was assumed directly into heaven. This is of course a special grace from God - those that are righteous would never presume to having done it on their own. what is significant is that they are called righteous.- meaning that they did what was right. This means they took action in accordance with God’s wishes.- consistent with Catholic doctrine.