'Forerunner' in the Bible

You yourselves are my witnesses that I stated, ‘I am not the Christ (the Messiah, the Anointed),’ but, ‘I have [only] been sent ahead of Him [as His appointed forerunner and messenger to announce and proclaim His coming].’

where Jesus has entered [in advance] as a forerunner for us, having become a High Priest forever according to the order of Melchizedek.