So I have been one to say the following quote from what I thought was a bible verse; "This too shall pass." but I have discovered that the exact phrase is not in the bible.
According to Wikipedia the phrase seems to have originated in the writings of the medieval Persian Sufi poets (Click here to read the Wiki article). I think these poets had some of God's wisdom when and if they created the phrase.
However the thought can also be found in the Word of God, just not in the exact format.In 2 Corinthians 4:17-18 we find the following: " Paul is expressing that all we go through is just temporary (in regard to our faith and persecution because of it), that it will be over once we get to heaven when all is revealed. All that we go through on this earth as Christians shall pass, sometimes they pass while we are still here on earth, such as illness or job loss or other trials that we may go through. But ultimately in the end when we are lifted up to be with God forever none of these things will even be a memory.
Another cool verse that basically gives us this promise is found in Romans 8:18 "For I consider that the sufferings of this present time are not worth comparing with the glory that is to be revealed to us." When we compare anything we are going through here on earth to what awaits us in heaven it (heaven) far outweighs it! That is a comfort.
Another cool verse that says He will help us through anything is 1 Peter 1:6-7 "
Again a promise that it (trials or illness or whatever you are going through) will not be forever but is just temporary.