According to the prevailing interpretation of 1 Cor 3.15, the phrase διὰ πυρός must be taken in the local sense, and the fire of vv. 13 and 15 plays no soteriological function. This article contests this reading, arguing that Paul's probable allusion to Mal 3 and his reference to the testing function of fire may imply refining as well. More importantly, it demonstrates that whereas the phrase διὰ πυρός is indeterminate and may take either the local or the instrumental sense, nearly every other instance of the construction σῴζω + διά + genitive in the relevant Greek literature has an instrumental sense.