"The leading men in our college should be men of piety and devotion. They should make the Bible the rule and guide of life, giving heed to the sure word of prophecy as to “a light that shineth in a dark place.” Not one of us should dare to be off guard for a moment, for “in such an hour as ye think not the Son of man cometh.” It is only those who continue faithful in well-doing that shall reap the reward. Much that has no part in Christ is allowed a place among us. Unconsecrated ministers, professors, and teachers assist Satan to plant his banner in our very strongholds. 5T 12.1"
"Therefore be ye also ready: for in such an hour as ye think not the Son of man cometh."
The phrase "in such an hour as ye think not the Son of man cometh" is a direct quote. The surrounding context in EGW's writing reinforces the connection.
"The design of our college has been stated again and again, yet many are so blinded by the god of this world that its real object is not understood. God designed that young men should there be drawn to Him, that they should there obtain a preparation to preach the gospel of Christ, to bring out of the exhaustless treasury of God's word things both new and old for the instruction and edification of the people. Teachers and professors should have a vivid sense of the perils of this time and the work that must be accomplished to prepare a people to stand in the day of God. 5T 12.2"
"Then said he unto them, Therefore every scribe which is instructed unto the kingdom of heaven is like unto a man that is an householder, which bringeth forth out of his treasure things new and old."
The phrase "bring out of the exhaustless treasury of God's word things both new and old" is a clear reference to Matthew 13:52, and the context of teaching and instruction further strengthens the connection.