3:10 Beat your plowshares 1 into swords,
and your pruning hooks 2 into spears! 3
Let the weak say, ‘I too am a warrior!’ 4
1 sn Instead of referring to the large plow as a whole, the plowshare is simply the metal tip which actually breaks the earth and cuts the furrow.
2 sn This implement was used to prune the vines, i.e., to cut off extra leaves and young shoots (M. Klingbeil, NIDOTTE 1:1117-18). It was a short knife with a curved hook at the end sharpened on the inside like a sickle.
3 sn This conversion of farming instruments to instruments of war is the reverse of Isa 2:4 (cf. Mic 4:3), where military weapons are transformed into tools for farming. Isaiah describes a time of kingdom blessing and prosperity, whereas Joel describes a time of eschatological conflict and judgment.
4 sn The “weak” individual mentioned here is apparently the farmer who has little or no military prowess or prior fighting experience. Under ordinary circumstances such a person would be ill-prepared for assuming the role of a soldier. However, in the scene that Joel is describing here even the most unlikely candidate will become a participant to be reckoned with in this final conflict.