3 Because you have the knowledge that the testing of your faith gives you the power of going on in hope;

4 But let this power have its full effect, so that you may be made complete, needing nothing.

3 sapendo che la prova della vostra fede produce costanza.

4 E la costanza compia appieno lopera sua in voi, onde siate perfetti e completi, di nulla mancanti.