Following Ash Wednesday, John links the readings so far and speaks of Paul as an ambassador for Christ, referring to 2 Corinthians 5:20-21 and 6:1-10.
20 We are therefore Christ's ambassadors, as though God were making his appeal through us. We implore you on Christ's behalf: Be reconciled to God. 21 God made him who had no sin to be sin for us, so that in him we might become the righteousness of God.
2 Corinthians 6:1-10
1 As God's co-workers we urge you not to receive God's grace in vain. 2 For he says, "In the time of my favor I heard you, and in the day of salvation I helped you."I tell you, now is the time of God's favor, now is the day of salvation. 3 We put no stumbling block in anyone's path, so that our ministry will not be discredited. 4 Rather, as servants of God we commend ourselves in every way: in great endurance; in troubles, hardships and distresses; 5 in beatings, imprisonments and riots; in hard work, sleepless nights and hunger; 6 in purity, understanding, patience and kindness; in the Holy Spirit and in sincere love; 7 in truthful speech and in the power of God; with weapons of righteousness in the right hand and in the left; 8 through glory and dishonor, bad report and good report; genuine, yet regarded as impostors; 9 known, yet regarded as unknown; dying, and yet we live on; beaten, and yet not killed; 10 sorrowful, yet always rejoicing; poor, yet making many rich; having nothing, and yet possessing everything.