Prove all things; hold fast that which is good.
1 Thessalonians 5:21
King James Version (public domain)
Traditionally attributed to Paul · 1st century AD · Thirteen epistles of the New Testament are traditionally attributed to him
Context
19Quench not the Spirit.
20Despise not prophesyings.
21Prove all things; hold fast that which is good.
22Abstain from all appearance of evil.
23And the very God of peace sanctify you wholly; and I pray God your whole spirit and soul and body be preserved blameless unto the coming of our Lord Jesus Christ.