How may we determine the truthfulness of any doctrine ?

Answer

"Prove all things; hold fast that which is good." 1 Thess. 5: 21.

How did the people of Samaria publicly testify to their faith in the preaching of Philip?
What answer did he return when asked concerning his mission?
What did the prophet see in this vision?
For whom has a book of remembrance been written?
In connection with what historical event was the old covenant made?
What were to be the signs on earth of Christ's coming?
What is promised those who trust in Jesus?

Questions & Answers are from the book Bible Readings for the Home Circle