day no. 15,934: one combination

One wiseacre once reportedly inquired as to why there were five solas reasoning that if they're so sola, why the need for more than one? Fair enough. 

A good safe opens to only one combination. If it responded to any combination of any numbers in any particular order, it would not be a safe. It would be an unsafe. You could not trust anything valuable to it. A safe that opens to any combination is just a junk drawer with thicker walls. 

But a combination is not made up of one number. It is several numbers coordinated in a certain order. So there is only one combination, but that combination is made up of several different numbers. Yet each number is unique to its station. If a combination was, for example, 10-31-15-17-1, each number works only in its assigned place. So one could say the safe is opened by 10 alone, 31 alone, 15 alone, 17 alone and 1 alone. The wiseacre from before could point out that if these numbers alone can open the safe, why do we need so many of them? But wisdom reveals that each of these numbers alone opens the safe as part of the one combination that gives one access to the treasure inside. The numbers are important and their order is important. 10 alone in the first slot opens the safe. 17 alone in the fourth slot opens the safe. 

So you can see how five numbers are one combination and how each alone opens the safe.

So too the five solas are one combination that provides access to the riches of His grace; wherein He hath abounded toward us in all wisdom and prudence (Eph 1:7-8)