When you pass through the waters, I will be with you; and through the rivers, they shall not overwhelm you; when you walk through fire you shall not be burned; and the flame shall not consume you. Isaiah 43:2.
The word through is an adverb - here in this verse - meaning to move - moving in one side and out the other - stating a process.
Many times we may say "I'm going through something" or you may hear someone say that they "are going through" - stating that they are experiencing something that is unpleasant and or difficult for them at the time. The mere fact that we can say that we are "going through" is or should be a faith statement - believing that we are going to get to the other side. Your "through" may be hearth ache, death of a loved one, disease, sickness, injury, financial hardship, etc.
As followers of Christ, Disciples of Christ - we should know and understand that we are not immune to life trials and tribulations - that we will or may experience all of the above. Every day will not be sunny and pleasant; however, we should understand that there is light at the end of the tunnel (we have to walk through). As Disciples of Christ we should know that the storm cloud will pass over and that trouble won't last always.
"By water and fire" in this scripture denotes all kinds of trouble and peril. Remember this - God is our ever present help in trouble. In all that we go through know that God has a divine purpose.