"“Quench not the Spirit. Despise not prophesyings. Prove all things; hold fast that which is good.” 1 Thessalonians 5:19-21 . EW 141.1"
"Quench not the Spirit. Despise not prophesyings. Prove all things; hold fast that which is good."
Ellen White directly references 1 Thessalonians 5:19-21 in this passage.
"expression, “Prove all things,” is limited to the subject of discourse, prophesyings, and we are to try the spirits by the tests which God has given us in His Word. Spiritual deceptions and false prophesyings abound at the present time; and doubtless this text has a special application here. But mark, the apostle does not say, Reject all things; but, Prove all things; Hold fast that which is good . EW 141.2"
"Prove all things; hold fast that which is good."
EGW directly quotes 1 Thessalonians 5:21 and uses it to support her argument about testing prophecies. This is an explicit allusion.