# the one who sanctifies

"the one who makes others holy" or "the one who makes others pure from sin"

# those who are sanctified

"those whom he makes holy" or "those whom he makes pure from sin" 

# have one source

"have one source, God himself"

# he is not ashamed

"Jesus is not ashamed"

# is not ashamed to call them brothers

"is pleased to call them fellow believers"