Understanding Mark 16:17–18

“And these signs will follow those who believe: In My name they will cast out demons; they will speak with new tongues; they will take up serpents; and if they drink anything deadly, it will by no means hurt them; they will lay hands on the sick, and they will recover.” (Mark 16:17-18, NKJV)

Mark 16:17–18 is often used in prayer as though proclaiming these words is part of exercising spiritual authority in casting out demons or praying for healing. A closer observation of the passage, however, raises a different understanding. The key is to consider verses 17–18 within their immediate literary context and alongside the wider teaching of the New Testament.

1. The passage is part of a commissioning.

Jesus appears to the disciples and rebukes them for their unbelief (v. 14). He then commissions them to “go into all the world and proclaim the gospel to the whole creation” (v. 15). The statements that follow concerning belief, unbelief, and signs therefore occur within the context of this commission.

2. The immediate context is belief and unbelief.

The passage moves from the disciples’ unbelief in verse 14 to the contrast between belief and unbelief in verse 16. Belief is presented as the response to the proclaimed gospel, while unbelief is its rejection. This is the immediate context in which verse 17 speaks about the signs.

3. The signs accompany those who believe.

Verse 17 says, “These signs will accompany those who believe.” The passage presents the signs as accompanying believers. It does not present them as something believers are instructed to obtain by reciting the statement about them.

The direction of the text is therefore significant:

belief → signs accompany

and not:

recitation → power → signs

4. The authority is in Jesus’ name.

The passage says, “In my name they will cast out demons.” The authority is associated with Jesus' name, not with the words of Mark 16:17–18 themselves.

Scripture may rightly be quoted in prayer, remembered, proclaimed, and used to strengthen faith. But the passage does not say that reciting its words gives someone spiritual authority.

5. The signs should not be understood as something every individual believer must possess.

The wider New Testament teaches that God distributes spiritual gifts according to His will. Paul asks, “Do all work miracles? Do all possess gifts of healing? Do all speak with tongues?” (1 Corinthians 12:29–30).

Therefore, the signs mentioned in Mark 16 should not be understood as requiring every individual believer to perform every sign. The passage speaks of signs accompanying believers without requiring that every believer manifest every sign.

6. Reciting the verse is not presented as the means of receiving what it describes.

This becomes particularly clear when the relationship between belief and the signs is considered. If someone does not believe, reciting Mark 16:17 does not make that person a believer. And if someone does believe, the passage does not present the recitation of verse 17 as the means by which that person receives the signs or authority described in the passage.

The text simply says that the signs will accompany those who believe. Therefore, while quoting the verse during prayer is not in itself wrong, treating its recitation as a necessary part of exercising spiritual authority cannot be established from this passage.

7. The hermeneutical principle

This illustrates a basic principle of biblical interpretation: Right observation leads to right interpretation, and right interpretation leads to right application.

We must first ask, “What does the text actually say?” before asking, “How should I use this text?” Mark 16:14–18 is situated within a commission to proclaim the gospel, with belief and unbelief placed in contrast, followed by the statement that signs will accompany those who believe.

Therefore, the passage describes signs accompanying believing followers in the context of Christ’s commission. It does not establish the recitation of the passage as a formula for obtaining or exercising spiritual authority.

The signs accompany believers; the recitation of the verse is not presented as the means by which they are received.