2 Bible Verses about Adversity, Purpose Of

And have you forgotten the exhortation that was addressed to you as sons? [Prov. 3:11f says], "My son, do not take the discipline of the Lord lightly, and do not get discouraged when He rebukes you. For the Lord disciplines those He loves, and punishes every child He accepts." [For the suffering] you are enduring [is] for your discipline. God is dealing with you as He does with [His] children, for what child is not disciplined by his father?read more.
But if you do not receive [such] discipline, like all of us do, then you are illegitimate children and not true children. Furthermore, we had earthly fathers to discipline us and we respected them [for it]; should we not much rather submit to the Father of our spirits [i.e., God], so we can live [spiritually]? For our human fathers disciplined us for a short time as it seemed best to them; but God disciplines us for our [spiritual] good, so that we may share in His holiness. No discipline seems pleasant, but painful, at the time [it is received], yet later on it produces a crop of peace and righteousness in [the lives of] those who have been trained by it.

Through God's power you are protected by [your] faith, so that you can expect to be saved in the end. Because of this you can be very joyous, even though it is necessary for you to have suffered many trials for a little while. But these will only test your faith, which is more valuable than gold which, though refined by fire, eventually perishes. Your faith, [however], will [endure and eventually] prove to be praiseworthy and honorable when Jesus returns.read more.
Although you have not seen Jesus, you [still] love Him and believe in Him, and this causes you to have an indescribable, glorious joy.