Sanctify them through Thy truth.
This is part of a petition of Jesus to God, and show shows Jesus as supplicant, asking that the Spirit of God (Thy truth) to be infused into all of mankind & his followers, so that they all can be “saved”.
Webster’s 1828 actually uses this sentence as the sample:
SANC’TIFY, v.t. [Low L. sanctifico; from sanctus, holy, and facio, to make.]
1. In a general sense, to cleanse, purify or make holy.
2. To separate, set apart or appoint to a holy, sacred or religious use. God blessed the seventh day and sanctified it. Gen. 2.
3. To purify; to prepare for divine service, and for partaking of holy things. Exodus. 19.
4. To separate, ordain and appoint to the work of redemption and the government of the church. John 10.
5. To cleanse from corruption; to purify from sin; to make holy be detaching the affections from the world and its defilements, and exalting them to a supreme love to God.
Sanctify them through thy truth; thy word is truth.