Robertson's Word Pictures (NT)
Sanctify (agiason). First aorist active imperative of agiazw. To consecrate or set apart persons or things to God. See Exodus 28:41; Exodus 29:1, Exodus 29:36; Exodus 40:13. See Paul's prayer for the Thessalonians (I Thessalonians 5:23). This is done in the sphere (en) of truth (God's truth), God's Word (not human speculation, but God's message to us).
Other Robertson's Word Pictures (NT) entries containing John 17:17:
1 Peter 1:22
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