1 Thessalonians 2:4; 1 Thessalonians 5:21

1 Thessalonians 2:4

4 but just as we have been approved by God to be entrusted with the gospel, so we speak, not as pleasing men, but God who examines our hearts.

1 Thessalonians 5:21

21 But examine everything carefully; hold fast to that which is good;