John Calvin on 1 Thessalonians 3:5

5 Lest perhaps the tempter has tempted you. By this term he teaches us that temptations are always to be dreaded, because it is the proper office of Satan to tempt. As, however, he never ceases to place ambushes for us on all sides, and to lay snares for us all around, so we must be on our watch, eagerly taking heed. And now he says openly what in the outset he had avoided saying, as being too harsh — that he had felt concerned lest his labors should be vain, if, peradventure, Satan should prevail. And this he does that they may be carefully upon their watch, and may stir themselves up the more vigorously to resistance.

1 Thessalonians 3:6-10

6. But now when Timotheus came from you unto us, and brought us good tidings of your faith and charity, and that ye have good remembrance of us always, desiring greatly to see us, as we also to see you:

6. Nuper autem quum venisset Timotheus ad nos a vobis, et annuntiasset nobis fidem et dilectionem vestram, et quod bonam nostri memoriam habetis semper, desiderantes nos videre, quemadmodum et nos ipsi vos:

7. Therefore, brethren, we were comforted over you in all our affliction and distress by your faith:

7. Inde consolationem percepimus fratres de vobis, in omni tribulatione et necessitate nostra per vestram fidem:

8. For now we live, if ye stand fast in the Lord.

8. Quia nunc vivimus, si vos stasis in Domino.

9. For what thanks can we render to God again for you, for all the joy wherewith we joy for your sakes before our God;

9. Quam enim gratiarum actionem possumus Deo reddere de vobis, in omni gaudio quod gaudemus propter vos coram Deo nostro;

10. Night and day praying exceedingly that we might see your face, and might perfect that which is lacking in your faith?

10. Nocte ac die supra modum precantes, ut videamus faciem vestram, et suppleamus quae fidei vestrae desunt?