Matthew 19: eternal life and kingdom of heaven

Who has eternal life? Those who belong to the kingdom of heaven, right?! Who is saved in Christian terms? Those who surrender their life to Jesus. Where in the Bible may we put all this together? In Matthew 19, we see all this together.
We read:

16 Another day, a man stopped Jesus and asked, “Teacher, what good thing must I do to get eternal life?”

A man (a rich guy) asks what he has to do to get eternal life, however here, in Matthew 19, is the first occurrence of "eternal life" of Matthew gospel. The enphasis on previous chapters has been on the kingdom of heaven. It is not explained how this guy came up with this question. I would expect much more a question like:

“Teacher, what good thing must I do to enter in the kingdom of heaven?”

However, after Jesus said that the rich guy should sell everything, he left Jesus. We read:

23-24 As he watched him go, Jesus told his disciples, “Do you have any idea how difficult it is for the rich to enter God’s kingdom? Let me tell you, it’s easier to gallop a camel through a needle’s eye than for the rich to enter God’s kingdom.”
25 The disciples were staggered. “Then who has any chance at all?”
26 Jesus looked hard at them and said, “No chance at all if you think you can pull it off yourself. Every chance in the world if you trust God to do it.”

Jesus commented that it was difficult for the rich guy to enter God's kingdom, however the question was about "eternal life". We can understand that "eternal life" and "enter in God's kingdom" are close related. Every Christian who is saved, believes they are on the way to eternal life because they trust what the Lord has done to them. In this same chapter, we understand that Jesus thinks of himself as much more important than any other disciples' family. Every Christian surrenders his life to Jesus as in:

28-30 Jesus replied, “Yes, you have followed me. In the re-creation of the world, when the Son of Man will rule gloriously, you who have followed me will also rule, starting with the twelve tribes of Israel. And not only you, but anyone who sacrifices home, family, fields — whatever — because of me will get it all back a hundred times over, not to mention the considerable bonus of eternal life. This is the Great Reversal: many of the first ending up last, and the last first.”

Sadly for the rich guy, he couldn't give up everything to follow Jesus.