James 1:2-4Amplified Bible (AMP)

² Consider it nothing but joy, my ^[a]brothers and sisters, whenever you fall into various trials. ³ Be assured that the testing of your faith [through experience] produces endurance [leading to spiritual maturity, and inner peace]. ⁴ And let endurance have its perfect result and do a thorough work, so that you may be perfect and completely developed [in your faith], lacking in nothing.