Not against us,
Is for us.”
ὃς γὰρ οὐκ ἔστιν καθ’ ἡμῶν, ὑπὲρ ἡμῶν ἐστιν.
This short saying is word for word in Luke, chapter 9:49, but not in Matthew. Mark indicated that Jesus said that whoever was not against them (ὃς γὰρ οὐκ ἔστιν καθ’ ἡμῶν), then he was for them (ὑπὲρ ἡμῶν ἐστιν). You were a friend until you became an enemy. If they were not against Jesus, then they must be for him.
“Whoever is not with me,
Is against me.
Whoever does not gather
ὁ μὴ ὢν μετ’ ἐμοῦ κατ’ ἐμοῦ ἐστιν, καὶ ὁ μὴ συνάγων μετ’ ἐμοῦ σκορπίζει.
This saying of Jesus is exactly the same, word for word, in Luke, chapter 11:23, thus indicating a Q source. You are either with Jesus or against him. There is no in between. Whoever is not with Jesus (ὁ μὴ ὢν μετ’ ἐμοῦ), is against him (κατ’ ἐμοῦ ἐστιν). Whoever does not gather with Jesus (καὶ ὁ μὴ συνάγων μετ’ ἐμοῦ), scatters abroad (σκορπίζει). Either you stand and gather with Jesus or you are against him and scatter everywhere. The choice is yours.