He is negating the first by denying the very possibility of «signs»; The Kingdom is not of
such a nature that a sign visible in terms of the totality of world
events or the externals of history or the cosmos will mark its presence; God is not to be seen at work in the clash of heavenly bodies or of
earthly armies.
Some may believe that the most reasonable response to some of what we as humans experience — for example, changed lives or unusual
events — is to assume that God unilaterally intervenes at times in
earthly affairs and thus conclude that any theistic perspective that does not allow for
such intervention must be considered inadequate.