but Christ [was faithful] as a Son over God's household. And we [Christians] are that household, if we hold on to our confidence [in Christ], and to the boasting [i.e., joy] of our hope [in God], firmly to the end [of our lives].

For we have become sharers with Christ, if we hold firmly onto the confidence [we had in Him] from the beginning until the end [of our lives].

And we will do so [i.e., go on to more advanced teaching] if God allows us to. For it is impossible to get people who have [completely] fallen away [from God] to repent again, because they [continue to] crucify for themselves God's Son all over again, and hold Him up to contempt.

He did this so that by two unchangeable things [i.e., His promise and His oath], (and it is impossible for God to lie), we, who have fled [to God] for refuge, could be greatly encouraged to take hold of the hope set before us [i.e., the hope of never ending life].

[So], we should hold on firmly to the profession of our hope [in God], without wavering from it, for God is faithful to His promises.