This article called "Year of Eucharist Is Also The Year For Lessening Purgatory" at http://www.spiritdaily.com/greedyforgrace.htm states, "The purpose of indulgences is to make up for penances omitted, or poorly done, or too light in comparison with the enormity of the sins. Indulgences arise from the mercy of Jesus; that is, with them we can satisfy our debts. I can win indulgences only for myself or those in Purgatory."

(There is no Bible scripture that states there is a purgatory, and Jesus paid the full ransom or the redemption price with his life to redeem us back to the Lord and for the forgiveness of our sins and for our healing. By Jesus stripes we were healed, and it is the blood of Jesus Christ that cleanses us from all sin and all unrighteouness. The Bible states the following:

Matthew 20:28
Even as the Son of man came not to be ministered unto, but to minister, and to give his life a ransom for many.Mark 10:45 For even the Son of man came not to be ministered unto, but to minister, and to give his life a ransom for many.
1 Timothy 2:5
For there is one God, and one mediator between God and men, the man Christ Jesus;
6 Who gave himself a ransom for all, to be testified in due time.

Ephesians 1:7
In whom we have redemption through his blood, the forgiveness of sins, according to the riches of his grace;
Colossians 1:14 In whom we have redemption through his blood, even the forgiveness of sins:

1 John 1:5
¶This then is the message which we have heard of him, and declare unto you, that God is light, and in him is no darkness at all.
6 If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth:
7 But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin.
8 ¶If we say that we have no sin, we deceive ourselves, and the truth is not in us.
9 If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.
10 If we say that we have not sinned, we make him a liar, and his word is not in us.

Matthew 6:9
¶After this manner therefore pray ye: Our Father which art in heaven, Hallowed be thy name.
10 Thy kingdom come. Thy will be done in earth, as it is in heaven.
11 Give us this day our daily bread.
12 And forgive us our debts, as we forgive our debtors.
13 And lead us not into temptation, but deliver us from evil: For thine is the kingdom, and the power, and the glory, for ever. Amen.

Hebrews 10:7
¶Then said I, Lo, I come (in the volume of the book it is written of me,) to do thy will, O God.
8 Above when he said, Sacrifice and offering and burnt offerings and offering for sin thou wouldest not, neither hadst pleasure therein; which are offered by the law;
9 Then said he, Lo, I come to do thy will, O God. He taketh away the first, that he may establish the second.
10 By the which will we are sanctified through the offering of the body of Jesus Christ once for all.
11 And every priest standeth daily ministering and offering oftentimes the same sacrifices, which can never take away sins:
12 But this man, after he had offered one sacrifice for sins for ever, sat down on the right hand of God;
13 From henceforth expecting till his enemies be made his footstool.
14 For by one offering he hath perfected for ever them that are sanctified.
15 Whereof the Holy Ghost also is a witness to us: for after that he had said before,
16 This is the covenant that I will make with them after those days, saith the Lord, I will put my laws into their hearts, and in their minds will I write them;
17 And their sins and iniquities will I remember no more.
18 Now where remission of these is, there is no more offering for sin.