"And we are His (Jesus') house if indeed we hold fast our confidence and our boasting in our hope." (Hebrews 3:6) Who is our hope? The Lord Jesus Christ! His finished work on the Cross!!!!
It's amazing what a defiled conscience can keep hidden from you in the wonderful Scriptures God has given us for our encouragement. How wonderful is He!?
I used to read this verse somehow "If indeed I continue faithful in my work for Jesus"...NO!!! It's if indeed you continue in faith in Jesus' work for YOU! This is a salvation that is by faith from first to last. Not faith and then no faith. You must continue in your confidence in the finished work of Jesus Christ!!!! Otherwise you believed in vain.
So brothers and sisters, let's run the race of faith! Keep your eyes on the finished work, firm to the end! He who promised is faithful. He will save you when He returns! He promised! Isn't it funny we make all these promises to God, when it's only by HIS promise that we are saved.
Believe it and rejoice!!!