"After Many Years From 1901 to 1909 Prof. C. W. Irwin acted as principal of the Avondale School; and in his report to the General Conference of 1909 he bore witness of the fulfillment of that which had been said would come to pass on the Avondale estate, as follows: LS 376"
"There failed not ought of any good thing which the Lord had spoken unto the house of Israel; all came to pass."
Both passages speak of the fulfillment of promises or predictions. Joshua 21:45 is a general statement about God's faithfulness to Israel, while the EGW passage refers to the fulfillment of specific prophecies regarding the Avondale estate. The connection is thematic, focusing on the idea of divine promises being realized.
"“In the future, more than in the past, our school must be an active missionary agency, as the Lord has specified.... Workers we must have, and in twenty-fold greater numbers, to supply the need in both the home and the foreign field. Therefore, the Avondale School must not be restricted in its facilities.” (Australasian) Union Conference Record, January 1, 1900 LS 376.1"
"Then saith he unto his disciples, The harvest truly is plenteous, but the labourers are few; Pray ye therefore the Lord of the harvest, that he will send forth labourers into his harvest."
This is a clear thematic parallel. EGW directly references the need for more workers in the field, mirroring the sentiment in Matthew 9:37-38 about the plenteous harvest and the few laborers. The context of training and sending workers from Avondale further strengthens the connection.
"“As time has gone on, and we have had an opportunity to watch the work develop, we can say most assuredly, from our experience, that God led in the selection of this place. Everything that has been said about the location of the school in this place, has been fulfilled,—everything.” LS 376.3"
"Now when they had gone throughout Phrygia and the region of Galatia, and were forbidden of the Holy Ghost to preach the word in Asia, After they were come to Mysia, they assayed to go into Bithynia: but the Spirit suffered them not. And they passing by Mysia came down to Troas. And a vision appeared to Paul in the night; There stood a man of Macedonia, and prayed him, saying, Come over into Macedonia, and help us. And after he had seen the vision, immediately we endeavoured to go into Macedonia, assuredly gathering that the Lord had called us for to preach the gospel unto them."
Both passages describe God's guidance in choosing a specific location or path. In Acts, the Holy Spirit directs Paul's missionary journeys. In the EGW passage, the speaker testifies that God led in the selection of the Avondale school's location. The parallel lies in the idea of divine direction in establishing a work.
"liberal plans for the school, that through my eight years’ connection with it I have never yet needed to change a single plan they had laid down. God guided in the establishment of the work there; and all we have endeavored to do during these eight years, has simply been to develop more fully the plans already made. I believe the working out of this has proved that God's instruction was true. LS 376.4"
"A man’s heart deviseth his way: but the Lord directeth his steps."
The EGW passage describes how God guided the establishment of the Avondale school, and the speaker's efforts were simply to develop the plans already made. Proverbs 16:9 states that while a man plans his way, the Lord directs his steps. Both passages highlight the idea of God's guidance and direction in human endeavors.