The intro and bridge are samples of black choir group Florida Mass Choir's track "Have You Been Tried In The Fire
" from the 1982 album Lord, You Keep On Proving Yourself To Me
. That song alludes to 1 Peter 1:7 in the New Testament, where St. Peter wrote:
"That the trial of your faith, being much more precious than of gold that perisheth, though it be tried with fire, might be found unto praise and honor and glory at the appearing of Jesus Christ."
St. Peter is saying that as gold is heated, impurities float to the top and can be skimmed off. Likewise, our trials refine and strengthen us, making us appreciate a life more useful to God.