Read Luke 13:22-30

JESUS TEACHES ABOUT ENTERING THE KINGDOM OF GOD
Jesus knew He was on His way to die, but He continued preaching to large crowds. The prospect of death did not deter Jesus from His mission.
Finding salvation requires more concentrated effort than most people are willing to put forth. Obviously you cannot save yourself: there is no way you can work yourself into God’s favor. You get in through the narrow door by asking Christ into your heart and receiving His forgiveness, and, this is what most people miss, earnestly desiring to know Jesus more and more, and diligently striving to follow Him whatever the cost. You dare not put off making this decision because the door will not stay open forever.
The people were eager to know who would be in God’s kingdom. Jesus explained that, although many people know something about God, only a few have acknowledged their sins and accepted His forgiveness. Just listening to Jesus’ words or admiring His miracles is not enough. You must turn from sin and trust God to save you.
You may not necessarily see the people you expect to find in the kingdom of God. Some perfectly respectable religious leaders claiming allegiance to Jesus will not be there because secretly they were morally corrupt.
God’s kingdom will include people from every part of the world. Israel’s rejection of Jesus as the Messiah would not stop God’s plan.
There will be many surprises in God’s kingdom. Some who are despised now will be greatly honored then; some influential people here will be left outside the gates. Many great people on this earth are virtually ignored by the rest of the world. What matters to God is not a person’s earthly popularity, status, wealth, heritage, or power but his/her commitment to Christ. How do your values match those of the Bible? Put God in first place, and you will join people from all over the world who will take their places at the feast in the kingdom of God.