The sermon was on 'Mark 10:13-31' which I will put below.
There are a few parts that need to be focused in on to understand the message of salvation in this text.
Let the Children Come to Me13 And they were bringing children to him that he might touch them, and the disciples rebuked them. 14 But when Jesus saw it, he was indignant and said to them, “Let the children come to me; do not hinder them, for to such belongs the kingdom of God. 15 Truly, I say to you, whoever does not receive the kingdom of God like a child shall not enter it.” 16 And he took them in his arms and blessed them, laying his hands on them.
The Rich Young Man17 And as he was setting out on his journey, a man ran up and knelt before him and asked him, “Good Teacher, what must I do to inherit eternal life?” 18 And Jesus said to him, “Why do you call me good? No one is good except God alone. 19 You know the commandments: ‘Do not murder, Do not commit adultery, Do not steal, Do not bear false witness, Do not defraud, Honour your father and mother.’” 20 And he said to him, “Teacher, all these I have kept from my youth.” 21 And Jesus, looking at him, loved him, and said to him, “You lack one thing: go, sell all that you have and give to the poor, and you will have treasure in heaven; and come, follow me.” 22 Disheartened by the saying, he went away sorrowful, for he had great possessions.
23 And Jesus looked around and said to his disciples, “How difficult it will be for those who have wealth to enter the kingdom of God!” 24 And the disciples were amazed at his words. But Jesus said to them again, “Children, how difficult it is[a] to enter the kingdom of God! 25 It is easier for a camel to go through the eye of a needle than for a rich person to enter the kingdom of God.” 26 And they were exceedingly astonished, and said to him,[b] “Then who can be saved?” 27 Jesus looked at them and said, “With man it is impossible, but not with God. For all things are possible with God.” 28 Peter began to say to him, “See, we have left everything and followed you.” 29 Jesus said, “Truly, I say to you, there is no one who has left house or brothers or sisters or mother or father or children or lands, for my sake and for the gospel, 30 who will not receive a hundredfold now in this time, houses and brothers and sisters and mothers and children and lands, with persecutions, and in the age to come eternal life. 31 But many who are first will be last, and the last first.”
a- Mark 10:24 Some manuscripts add for those who trust in riches
b- Mark 10:26 Some manuscripts to one another
In Verses 13-16, we see Jesus tell us that we should receive the kingdom of God like a child. Many take this to mean we should have blind faith and not think too much about what our Christian beliefs are. This is not how it is meant to be taken, as the idea of blind faith is demonstrably non-Christian.
test everything. Hold on to what is good -- 1 Thessalonians 5:21
Rather what Jesus really meant is exemplified in the following story about the rich man, which is probably why Mark put it here in this order.