2 Bible Verses about Adversity, Purpose Of

and you have forgotten the exhortation which is addressed to you as to sons: My son, despise not the chastening of the Lord, nor faint when you are reproved by him. For, whom the Lord loves, he chastens, and scourges every son that he receives. If you endure chastening, God deals with you as with sons: for what son is there whose father chastens him not?read more.
But if you are without chastisement, of which all are par takers, then are you bastards, and not sons. So, then, we have had fathers of our flesh who corrected us, and we reverenced them; shall we not much rather be in subjection to the Father of our spirits, and live? For they, indeed, for a few days, chastened us as they thought it good; but he chastens us for our profit, that we may be partakers of his holiness. But no chastisement seems, at the time, to be a matter of joy, but of grief: yet afterward, it yields the peaceable fruit of righteousness to those who are exercised by it.

who are kept secure by the power of God through faith, to a salvation ready to be revealed in the last time: in which you rejoice, though now for a little while, since it is needful, you are in sorrow under various temptations; that your faith, when proved, being much more precious than gold, which perishes though it be tried by fire, may be found to be for praise and honor and glory, at the revelation of Jesus Christ;read more.
-whom, though you have not seen him, yet you love; on whom not now looking, but believing, you rejoice with joy unspeakable, and full of glory,