For ye may all prophesy one by one - The gifts which God grants are given for the purpose of edification; but there can be no edification where there is confusion; therefore let them speak one by one.
For ye may all prophecy - There is time enough for all; there is no need of speaking in confusion and disorder. Every person may have an opportunity of expressing his sentiments at the proper time.
That all may learn - In such a manner that there may be edification. This might be done if they would speak one at a time in their proper order.