Hebrews 3:1

We should give careful attention to Jesus because of our solidarity as brothers and our holy calling as participants in His future reign and joy (Hebrews 2:10-12). Our calling as Christians is not just earthly but also heavenly.

Jesus Christ is the "Apostle" (lit. delegate, messenger, one sent forth with orders) in that He is the One God sent to reveal the Father to humankind (cf. Hebrews 1:1-2; John 1:14; John 3:17; John 3:34; John 5:36; John 5:38; et al.). Furthermore He is the "High Priest" in that He is the One God anointed to represent human beings to Himself (Hebrews 2:17-18). Our confession is that for which we take a public stand in water baptism, namely, Christianity (cf. Hebrews 4:14; Hebrews 10:23).