John 17:18-21

As thou didst send me into the world, even so sent I them into the world. And for their sakes I sanctify myself, that they themselves also may be sanctified in truth. Neither for these only do I pray, but for them also that believe on me through their word; that they may all be one; even as thou, Father, art in me, and I in thee, that they also may be in us: that the world may believe that thou didst send me.