Does it Really Matter?
If Jesus is not raised from the dead, we are fools and life is a meaningless, hopeless tragedy.
Unbelief is everywhere all the time.
The first thing I want you to notice, unbelief is nothing new. Sure it is hard to believe in the resurrection of Jesus now, but it was hard then too.
A simple argument.
1 Corinthians 15:12–13 Now if Christ is proclaimed as raised from the dead, how can some of you say that there is no resurrection of the dead?  But if there is no resurrection of the dead, then not even Christ has been raised. (ESV)
Distinguish doubt and unbelief
Matthew 28:17 And when they saw him they worshiped him, but some doubted. (ESV)
Jesus words to us are the same as to Thomas: John 20:27 Then he said to Thomas, “Put your finger here, and see my hands; and put out your hand, and place it in my side. Do not disbelieve, but believe.” (ESV)
Importance of Fellowship
1 Corinthians 15:33–34 Do not be deceived: “Bad company ruins good morals.”
If Christ is not raised we are the most to be pitied.
If he is not raised, we are still in our sins.
1 Corinthians 15:16–19 For if the dead are not raised, not even Christ has been raised.  And if Christ has not been raised, your faith is futile and you are still in your sins.
If he is not raised, life is meaningless
 Then those also who have fallen asleep in Christ have perished.  If in Christ we have hope in this life only, we are of all people most to be pitied. (ESV)
Since Christ is raised our works are not in vain.
1 Corinthians 15:20–21 But in fact Christ has been raised from the dead, the firstfruits of those who have fallen asleep.  For as by a man came death, by a man has come also the resurrection of the dead. (ESV)
Assurance of Eternal life.
Assurance of our Justification
Assurance our lives matter.
1 Corinthians 15:58 Therefore, my beloved brothers, be steadfast, immovable, always abounding in the work of the Lord, knowing that in the Lord your labor is not in vain.