Sins of "ignorance" arise from the weakness of human nature.

It is very difficult to see these sins behind oneself and to protect oneself from them.

Who understands the Fall? (Psalm 18:13), says the Prophet David, that is, who can see his faults, his ignorance.

However, since these are also sins, it is possible to keep from them; And therefore he adds a prayer: cleanse me from my secrets, that is, from sins committed by me through weakness and ignorance, which are either unknown to me, or which I do not remember, or which I do not even consider as sins.

To sin "willingly" means to sin knowingly, with intent and out of malice.

The Apostle Paul speaks of these sins as follows: if we, having received the knowledge of the truth, sin willfully, then there is no more sacrifice for sins.

It is impossible for those who have apostatized from Christ and willingly rebel against Him to receive forgiveness; as the same Apostle explains, saying: "It is impossible for those who have once been enlightened, and have tasted the heavenly gift, and have become partakers of the Holy Spirit, and have tasted the good word of God, and the powers of the age to come, and have fallen away, to be renewed again by repentance; when they again crucify the Son of God in themselves and mock Him (Heb. 6:4, 5, 6).

But what is impossible for men is possible for God: the special mercy of the Lord can touch the heart of the sinner and return him to the path of truth. "Involuntary sin" is one that a person does not foresee, commits it against his will and desire.

Of the great multitude of sins, the most important, grave sins are called "mortal"; for for the unrepentant sinner, who stubbornly abides in them, comes after bodily death, spiritual death, and with it eternal separation from God, perdition and endless torment.

There are seven deadly sins: pride, love of money, fornication, envy, gluttony, laziness and anger.

From these sins, as from seven mothers, all other sins are born.

If these seven sins, these seven mothers, are eradicated, then all their offspring, all other sins will be destroyed.

These mortal sins are similar to those seven demons that the Lord Jesus Christ cast out from the body of the sinner, Mary Magdalene.

They can also be compared to the seven enemies of the people of Israel, who had to be destroyed in order to enter the promised land, which represents the Kingdom of Heaven.