25 And there went great multitudes with him: and he turned, and said unto them,
26 If any man come to me, and hate not his father, and mother, and wife, and children, and brethren, and sisters, yea, and his own life also, he cannot be my disciple.
27 And whosoever doth not bear his cross, and come after me, cannot be my disciple.
28 For which of you, intending to build a tower, sitteth not down first, and counteth the cost, whether he have sufficient to finish it?
29 Lest haply, after he hath laid the foundation, and is not able to finish it, all that behold it begin to mock him,
30 Saying, This man began to build, and was not able to finish.
31 Or what king, going to make war against another king, sitteth not down first, and consulteth whether he be able with ten thousand to meet him that cometh against him with twenty thousand?
32 Or else, while the other is yet a great way off, he sendeth an ambassage, and desireth conditions of peace.
33 So likewise, whosoever he be of you that forsaketh not all that he hath, he cannot be my disciple.
34 Salt is good: but if the salt have lost his savour, wherewith shall it be seasoned?
35 It is neither fit for the land, nor yet for the dunghill; but men cast it out. He that hath ears to hear, let him hear.
Hide
As we can see, Jesus directly warns each person what the way into the Kingdom costs. And He advises: before you decide to follow Me, weigh everything calmly and soberly. Do you want what I can give you? Are you ready to walk the path you will have to walk? Of course, there is no desire here to frighten anyone or turn anyone away from the way into the Kingdom. But there is an understanding that, once a person has set foot on this path, turning aside from it later, if it remains possible at all, will come with serious spiritual losses, and perhaps not only spiritual ones.
It is no accident that the Savior compares the situation of someone preparing to enter the Christian path with the situation of a person preparing to build a watchtower in his field, or with the situation of a ruler preparing to go to war against a neighbor. In both cases it is better to think everything through before beginning, because failure can leave a person in a position far worse than the one he would have been in if he had abandoned the plan. According to Jesus, the cost of the way is renouncing everything this untransformed world, lying in evil, can give.
It is no accident that the Savior uses the image of the cross. In the Gospel era it was clear to everyone in Judea, since all the inhabitants of the country still remembered the revolt that had taken place earlier, during the years of independence, when the revolt organized by the Pharisaic brotherhood against Alexander Jannaeus was suppressed. In the rebels' judgment, that ruler had pursued a policy completely contrary to the Torah. At that time the participants in the revolt suppressed by the authorities were crucified: a punishment not only agonizing, but also humiliating for any Jew.
Jesus directly warns everyone who wants to follow Him: one must be ready for anything, as the participants in that revolt were ready for anything for the sake of their faith, and even the cross did not frighten them. The point here is not that the Kingdom Jesus brought into the world will have to be established by force, as the participants in the revolt under Alexander Jannaeus wanted to establish it by force.
The point is that, according to the Savior's own word, it is "not of this world." Therefore "this world" will always be hostile to it, not because of nature, which can be transformed and which in the end will be transformed, but because of the evil that entered the world after the fall. This conflict with the forces of evil acting in the world is what makes the cross inevitable for every Christian, in one form or another. But, as we can see, there is no other road into the Kingdom. And each person, of course, decides for himself whether to walk it.