James 1:3

Knowing this ,.... By experience; as everyone that is trained up in the school of affliction does: the apostle appeals to the saints, to whom he writes, for the truth of what he was about to say; and which he gives as a reason why they should rejoice in afflictions, because it is a known fact,

that the trying of your faith worketh patience : two things afflictions do when sanctified; one is, they try faith, the truth of it, and make it appear to be true, genuine, and precious, like gold tried in the fire; see 1 Peter 1:6 and the other is, that they produce patience: saints being inured to afflictions, become by degrees more patient under them; whence it is good for a man to bear the yoke in his youth: this phrase may be understood, both of faith, which being tried by afflictions, produces patience; for where the one is in exercise, the other is also, and both are necessary under afflictive providences; and also of afflictions, which try faith, and being sanctified by the Spirit of God, work patience, which is a fruit of the Spirit; for otherwise the effect of them is impatience; and this agrees with the Apostle Paul in Romans 5:3 .