"“‘The prophet that hath a dream, let him tell a dream.’ Jeremiah 23:28 . 1T 602.2"
"The prophet that hath a dream, let him tell a dream; and he that hath my word, let him speak my word faithfully. What is the chaff to the wheat? saith the Lord."
Ellen White directly references Jeremiah 23:28 in this passage.
"follow. We went along the hillside, passing with much difficulty three wet boggy places, through which small streams of muddy water were flowing. There was no way to cross these only by wading. Having accomplished this, we came to nice, hard ground and a place where there was a jog in the bank, and a large spring of the purest sparkling water was boiling up. A large vat was placed there, very much like the plunge tub at the Health Institute at Battle Creek. A pipe was running from the spring into one end of the vat, and the water was overflowing at the other. The sun was shining brightly, and the water sparkled in its rays. 1T 602.4"
"But whosoever drinketh of the water that I shall give him shall never thirst; but the water that I shall give him shall be in him a well of water springing up into everlasting life."
The EGW passage describes a literal spring of water, while the John 4:14 passage speaks of spiritual water. However, the imagery of 'springing up' connects the two, suggesting a thematic parallel. The confidence is high because EGW directly references the spring and its purity.