PROOF of relationship-
"My son, do not despise the Lord’s discipline and do not resent his rebuke, because the Lord disciplines those he loves, as a father the son he delights in." Proverbs 3:11-12
"Our fathers disciplined us for a little while as they thought best; but God disciplines us for our good, that we may share in his holiness." Hebrews 12:10
"Discipline your son, and he will give you peace; he will bring delight to your soul." Prov. 29:17
"Those whom I love I rebuke and discipline. So be earnest, and repent." Rev. 3:19
If you are currently experiencing the Refiner's fire...I hope this encourages you to remember...God's loving discipline shows you are His child, He desires a restored relationship with you, and He is faithful to all His promises!
PS..I am well aware that not every lifetime trial is spiritual discipline for sin...(aka Job.) If you are unsure..just pray...and ask God...and He will point out what he wants changed and learned!