Hebrews 3:1

Therefore, holy brothers, you who share in a heavenly calling, consider Jesus, the apostle and high priest of our confession,

(Hebrews 3:1 ESV)

Once again, it is emphasized again that Jesus is fully man. He took on our nature. And because of this he should be strongly considered by us.

Holy - set apart to God; being sanctified
Brothers - of one family; Author also considered those he was writing to as his brothers
Heavenly calling - pertaining to heaven, not earth; called from above
Consider - Jesus is worthy to be considered
Apostle - only place where it is applied to Jesus; sent from God; as Moses was the great apostle of God, but Jesus is superior in dignity and authority
High Priest - Jesus fulfills this office in every way as it is abolished in the fulfillment of Jesus
Profess - Of that belief which we profess; confess

We are set apart to God as we are of one family. Our calling is from heaven. Jesus is of great rank and value to be considered by all. Jesus, the apostle and the completed High priest. We confess Him.

Hebrews 2:18

For because he himself has suffered when tempted, he is able to help those who are being tempted.
(Hebrews 2:18 ESV)

The word tempted takes on more of the meaning as put to the proof to see whether a person has sincere piety and love to God. We also see that Jesus showed he had a strength of virtue where no matter what came his way he could bear it. Jesus is qualified to sympathize with us because he has endured like trials. But, he suffered more than we could ever suffer. For that he is our brother and is never ashamed to call us brethren, we can rest our burdens on him.

Hebrews 2:17

Therefore he had to be made like his brothers in every respect, so that he might become a merciful and faithful high priest in the service of God, to make propitiation for the sins of the people.
(Hebrews 2:17 ESV)

Jesus became like man in every respect. This was essential. Nothing was to be left out. As such, the descendants of Abraham are his brothers. Mercy is not giving someone what they deserve. With a nature like ours, his compassion extends to us all the more because he knows and understands the trials we experience. Yet, his service (unlike ours) was always marked by faithfulness and this means we are safe. He surpasses the Jewish High Priest. "The Son of God became a man, that he might so fully enter into the feelings of the people as to be faithful, and that he might be qualified, as a high priest, to perform the great work of rendering God propitious in regard to sins." Before God, we now have favor and success.

Hebrews 2:16

For surely it is not angels that he helps, but he helps the offspring of Abraham.
(Hebrews 2:16 ESV)

To help means to take hold of one as by the hand. Mr 8:23 ("he took the blind man by the hand"), Ac 23:19 ("the tribune took him by the hand"), Lu 9:47 ("Jesus took a child and put him by his side") all give the picture of the actual person taking someone by the hand, to aid them, to come alongside. Jesus comes to our aid, not to the aid of angels. To redeem man, it was necessary for him to be a man. Yes, he is speaking to descendants of Abraham, but he is not excluding the entire human race; he is at this moment speaking to one of his children, but that doesn't mean he excludes the others.