Well, here’s something Jesus said which may be relevant:
Matthew, 7; 21-23
"'It is not anyone who says to me, “Lord, Lord,” who will enter the kingdom of Heaven, but the person who does the will of my Father in heaven.
22 When the day comes many will say to me, “Lord, Lord, did we not prophesy in your name, drive out demons in your name, work many miracles in your name?”
23 Then I shall tell them to their faces: I have never known you; away from me, all evil doers!
I would recommend reading the whole chapter for the context.
James 2; 17-19
17 In the same way faith, if good deeds do not go with it, is quite dead.
18 But someone may say: So you have faith and I have good deeds? Show me this faith of yours without deeds, then! It is by my deeds that I will show you my faith.
19 You believe in the one God – that is creditable enough, but even the demons have the same belief, and they tremble with fear.
We can never know in any individual case. God’s mercy and understanding is beyond our comprehension. But He was very clear about how we will be judged. We will be judged with the same mercy we show others, and Jesus account of our final judgement indicates we will be judged as much for the good deeds we failed to perform as the sins we committed:
31 'When the Son of man comes in his glory, escorted by all the angels, then he will take his seat on his throne of glory.
32 All nations will be assembled before him and he will separate people one from another as the shepherd separates sheep from goats.
33 He will place the sheep on his right hand and the goats on his left.
34 Then the King will say to those on his right hand, "Come, you whom my Father has blessed, take as your heritage the kingdom prepared for you since the foundation of the world.
35 For I was hungry and you gave me food, I was thirsty and you gave me drink, I was a stranger and you made me welcome,
36 lacking clothes and you clothed me, sick and you visited me, in prison and you came to see me."
37 Then the upright will say to him in reply, "Lord, when did we see you hungry and feed you, or thirsty and give you drink?
38 When did we see you a stranger and make you welcome, lacking clothes and clothe you?
39 When did we find you sick or in prison and go to see you?"
40 And the King will answer, “In truth I tell you, in so far as you did this to one of the least of these brothers of mine, you did it to me.”
41 Then he will say to those on his left hand, "Go away from me, with your curse upon you, to the eternal fire prepared for the devil and his angels.
42 For I was hungry and you never gave me food, I was thirsty and you never gave me anything to drink,
43 I was a stranger and you never made me welcome, lacking clothes and you never clothed me, sick and in prison and you never visited me."
44 Then it will be their turn to ask, “Lord, when did we see you hungry or thirsty, a stranger or lacking clothes, sick or in prison, and did not come to your help?”
45 Then he will answer, “In truth I tell you, in so far as you neglected to do this to one of the least of these, you neglected to do it to me.”
46 And they will go away to eternal punishment, and the upright to eternal life.’
But in several parables Jesus does indicate that God wants and is willing to forgive us. He said there will be more rejoicing in heaven over the return of a sinner than over the righteous. The parable of the prodigal son, the parable of the workers in the field both indicate we can return to Our Father and even those who did not serve as long or as well may expect the same reward.
