When I read this passage before, I used to think that the three Hebrew boys were a stoic bunch, declaring that they would suffer the fiery furnance, whether God delivered them or not.
The truth is much more glorious, and the revelation is much clearer considered in the light of more accurate translations.
"If it be so (you throw us into the fire), our God is able to deliver us. . .If it be not so (you do not throw us into the fire),"
Not once did the three Hebrew children doubt whether He would save them or not.
They were simply making it clear, whether the king threw them in the fire or not, they would worship no other God but the LORD, Him who has been from the beginning (1 John 2:12-14), He who is the same yesterday, today, and forever (Hebrews 13: 8)
We should never doubt that God our Father will care for us, no matter what we go through:
"But now thus saith the LORD that created thee, O Jacob, and he that formed thee, O Israel, Fear not: for I have redeemed thee, I have called thee by thy name; thou art mine.
2When thou passest through the waters, I will be with thee; and through the rivers, they shall not overflow thee: when thou walkest through the fire, thou shalt not be burned; neither shall the flame kindle upon thee." (Isaiah 40: 1-2)
"For if, when we were enemies, we were reconciled to God by the death of his Son, much more, being reconciled, we shall be saved by his life." (Romans 5: 10)
"What shall we then say to these things? If God be for us, who can be against us? 32He that spared not his own Son, but delivered him up for us all, how shall he not with him also freely give us all things? 33Who shall lay any thing to the charge of God's elect? It is God that justifieth. 34Who is he that condemneth? It is Christ that died, yea rather, that is risen again, who is even at the right hand of God, who also maketh intercession for us." (Romans 8: 31-34)
"Wherefore he is able also to save them to the uttermost that come unto God by him, seeing he ever liveth to make intercession for them." (Hebrews 7: 25)
Do not worry about whether He will save you are not, whatever trial you are facing. Jesus is our Savior, and just as He was with the three Hebrews boys in the fire (Daniel 3: 25), so too He is with you, whether you go through any trial or not.