The closer the Crucifixion comes, the more time Jesus spends with His disciples. He speaks to them about the sufferings awaiting Him. But His disciples do not understand Him; they are thinking not about suffering and death, but about glory and privileges. This is where the argument comes from: "Who is greater? Who will receive more authority in the Kingdom of the Messiah?" John, in addition, seeks to protect the twelve disciples from competition on the part of "outsiders." At the same time, the boundary of "our own circle" is drawn by a very simple sign: "ours" are those who walk with us.
Christ rejects both attempts to build a pyramid of power and honors and the desire to turn the community of disciples into a closed club. He says directly to John: "Do not forbid him." Then He unexpectedly begins a conversation about the danger of stumbling blocks, ending it with the words: "Have salt in yourselves, and be at peace with one another." Here one can see an echo of John's question and of the disciples' arguments about who is greater. The desire to separate "our own" from "outsiders," and to arrange "our own" by rank, destroys peace and makes people suspicious and hostile. Without peace among themselves, Christ's disciples cannot fulfill their mission in the world: to be "the salt of the earth" (Matt. 5:13). (Let us recall that every sacrifice was salted with salt before being offered to God on the altar (Lev. 2:13). Salt, as it were, made the sacrifice fit for God).
What does the word "stumbling block" mean? Other translations of this Greek word ("skandalon") are trap, snare, noose. It is everything that by deception, on the sly, pushes the simplehearted toward a fall or simply gets in the way and obstructs. Let us think about the extent to which the struggle for power, quarrels, and divisions among Christians serve as a stumbling block for "these little ones" and hinder those seeking the Truth from coming to saving faith.
