"Luther's efforts on this occasion were not without good results. The large assembly present had opportunity to compare the two men, and to judge for themselves of the spirit manifested by them, as well as of the strength and truthfulness of their positions. How marked the contrast! The Reformer, simple, humble, firm, stood up in the strength of God, having truth on his side; the pope's representative, self-important, overbearing, haughty, and unreasonable, was without a single argument from the Scriptures, yet vehemently crying: “Retract, or be sent to Rome for punishment.” GC 137.2"
"Wherefore by their fruits ye shall know them."
The contrast between Luther and the Pope's representative, highlighting their different spirits and arguments, directly reflects the principle of judging by fruits as stated in Matthew 7:20. The passage explicitly contrasts the character and actions of the two figures.
Notwithstanding Luther had secured a safe-conduct, the Romanists were plotting to seize and imprison him. His friends urged that as it was useless for him to prolong his stay, he should return to Wittenberg without delay, and that the utmost caution should be observed in order to conceal his intentions. He accordingly left Augsburg before day-break, on horseback, accompanied only by a guide furnished him by the magistrate. With many forebodings he secretly made his way through the dark and silent streets of the city. Enemies, vigilant and cruel, were plotting his destruction. Would he escape the snares prepared for him? Those were moments of anxiety and earnest prayer. He reached a small gate in the wall of the city. It was opened for him, and with his guide he passed through without hindrance. Once safely outside, the fugitives hastened their flight, and before the legate learned of Luther's departure, he was beyond the reach of his persecutors. Satan and his emissaries were defeated.…
"But their laying await was known of Saul. And they watched the gates day and night to kill him."
Both passages describe a situation where a religious figure (Luther and Paul) is secretly fleeing from enemies who are plotting to capture or kill them. The element of danger, secret escape, and the presence of enemies are common themes.