20 by a new and living way opened for us through the curtain, that is, his body,

Read Hebrews 10:20 Using Other Translations

By a new and living way, which he hath consecrated for us, through the veil, that is to say, his flesh;
by the new and living way that he opened for us through the curtain, that is, through his flesh,
By his death, Jesus opened a new and life-giving way through the curtain into the Most Holy Place.