The suffering of sickness and the suffering of persecution have this in common: they are both intended by Satan for the destruction of our faith, and governed by God for the purifying of our faith... Christ sovereignly accomplishes His loving, purifying purpose, by overruling Satan's destructive attempts. Satan is always aiming to destroy our faith; but Christ magnifies His power in weakness.
John PiperThe line of lovelessness is not drawn between speaking and doing, but between speaking and doing in the truth, and speaking and doing in emptiness. Truth turns word-love into deed-love.
John Piper'Worship' is the term we use to cover all the acts of the heart and mind and body that intentionally express the infinite worth of God. This is what we were created for, as God says in Isaiah 43:7, Everyone who is called by my name, and whom I have created for my glory. That means that we were all created for the purpose of expressing the infinite worth of God's glory. We were created to worship.
John Piper