That ye be not led astray (μη πλανηθητε). First aorist passive subjunctive with μη (lest). This verb πλαναω occurs here only in Luke though often in the rest of the N.T. (as Matthew 24:4; Matthew 24:5; Matthew 24:11; Matthew 24:24, which see). Our word planet is from this word.

The time is at hand (ο καιρος ηγγικεν). Just as John the Baptist did of the kingdom (Matthew 3:2) and Jesus also (Mark 1:15).

Go ye not after them (μη πορευθητε οπισω αυτων). First aorist passive subjunctive with μη. A needed warning today with all the false cries in the religious world.