Christianity is not primarily good advice, but good news

32 Two others, who were criminals, were led away to be put to death with him. 33 And when they came to the place that is called The Skull, there they crucified him, and the criminals, one on his right and one on his left.
Luke 23:32-33

39 One of the criminals who were hanged railed at him, saying, “Are you not the Christ? Save yourself and us!” 40 But the other rebuked him, saying, “Do you not fear God, since you are under the same sentence of condemnation? 41 And we indeed justly, for we are receiving the due reward of our deeds; but this man has done nothing wrong.” 42 And he said, “Jesus, remember me when you come into your kingdom.” 43 And he said to him, “Truly, I say to you, today you will be with me in paradise.”
Luke 23:39-43

Heaven is not filled with good people, but with forgiven people

1 But on the first day of the week, at early dawn, they went to the tomb, taking the spices they had prepared. 2 And they found the stone rolled away from the tomb, 3 but when they went in they did not find the body of the Lord Jesus. 4 While they were perplexed about this, behold, two men stood by them in dazzling apparel. 5 And as they were frightened and bowed their faces to the ground, the men said to them, “Why do you seek the living among the dead? 6 He is not here, but has risen. Remember how he told you, while he was still in Galilee,7 that the Son of Man must be delivered into the hands of sinful men and be crucified and on the third day rise.”
Luke 24:1-7

The empty tomb validates the cross

Because Jesus died for sin, you can be forgiven

Because Jesus rose again, you can rise with Him