"The chain" is a symbol of God's physical Laws, which restrain, contain all sinful actions of man, which destroy the nature created by God, the world around us.
"The Chain" is the power, the might, the wisdom of the Word of God's Will, which restrains, restrains, limits and constrains the freedom of action of sinful man.
It is the Truth of God's Commandments, the awareness and fulfillment of which prevents all sinful thoughts and deeds of man.
These are the Words of the reproving Truth of God's Laws, expressed by the Prophets, the Apostles, witnessed by all the righteous in the Holy Scriptures and in the Gospel Teaching - Jesus Christ.
"Chain" is also a symbol of the conscience given to man by God, which, as a witness to the Will of God, keeps him from wrongdoing.
Negative meaning of the word:
"Chains of Hell" is the agonizing condition of man, experiencing the consequences of crimes committed and being haunted by the fear of punishment.
The "chains" of punishment, i.e., the restraint on man's committing evil, are also the consequences of his transgressions of God's Commandments.