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John Gill
Watch therefore,.... Since the time of this desolation is so uncertain, and since it will come upon the Jews unawares, and some wilt escape, whilst others perish; for the words are plainly an inference from what precedes, and clearly relate to things going before, and are not a transition to a new subject: for ye know not what hour your Lord doth come; to avenge himself of the unbelieving Jews,...
Matthew Henry
Christ's preaching was mostly practical; but, in this chapter, we have a prophetical discourse, a prediction of things to come; such however as had a practical tendency, and was intended, not to gratify the curiosity of his disciples, but to guide their consciences and conversations, and it is therefore concluded with a practical application. The church has always had particular prophecies,...
Charles H. Spurgeon
Watch therefore: for ye know not what hour your Lord doth come. That he will come, is certain. That his coming may be at any moment, is equally sure; and, therefore, we ought to be always ready for his appearing. The Lord mate us to be so!