Do we rejoice in the Lord all day long? If so, we most certainly must be praying without ceasing. If this describes us then we should also be giving thanks for all that the Lord provides, and does, for us as our day proceeds. All three of these things, Rejoicing, Praying, and Giving Thanks, are all contained in a single sentence as Paul writes to the Thessalonians. They are joined for a reason, and are meant to lift us up in spirit... then unite us with the words Always, Without Ceasing, and All Circumstances, to show us the degree of their importance.