Then Jesus said to his disciples, "Amen, I say to you, it will be hard for one who is rich to enter the kingdom of heaven. Again I say to you, it is easier for a camel to pass through the eye of a needle than for one who is rich to enter the kingdom of God." When the disciples heard this, they were greatly astonished and said, "Who then can be saved?" Jesus looked at them and said, "For human beings this is impossible, but for God all things are possible." Then Peter said to him in reply, "We have given up everything and followed you. What will there be for us?" Jesus said to them, "Amen, I say to you that you who have followed me, in the new age, when the Son of Man is seated on his throne of glory, will yourselves sit on twelve thrones, judging the twelve tribes of Israel. And everyone who has given up houses or brothers or sisters or father or mother or children or lands for the sake of my name will receive a hundred times more, and will inherit eternal life. But many who are first will be last, and the last will be first. (Mt 19:23-30)
Salvation is a gift of God. Gift is given. It cannot be asked for. It cannot be acquired. It cannot be bought. It cannot be achieved. If achieved then it is a prize. Similarly the kingdom of God is also. Entry into the kingdom cannot be achieved. Entry ticket is not bought. Money cannot buy the kingdom and money cannot make one a member of the kingdom. Money and kingdom are opposed values.
Disciples have left everything and followed Jesus. They have left everything which means they have nothing with them except Jesus. They cannot but follow him. He is the only relation to belong to, he is the only way to follow, he is the only person to love, he is the only person to serve in a sense he is everything. They have left everything and Jesus is everything for the disciples.
The reward for this is that they become the leaders and judges of the twelve tribes of the new Israel. They have everything in Jesus and Jesus becomes everything for them. All what they have left they get back hundredfold. Besides this they also inherit eternal life.
