Matthew 24:44 - Ellicott's Commentary On The Whole Bible

In such an hour as ye think not. — The words are important as showing that even the signs which were to be as the budding of the fig-tree at the approach of summer were intended only to rouse the faithful to watchfulness, not to enable men to fix the times and the seasons which the Father hath set in His own power. The apparent destiny of failure which has attended on all attempts to go beyond this in the interpretation of the apocalyptic eschatology of Scripture might have been avoided had men been more careful to restrain here also their efforts after knowledge “within the limits of the knowable.”