We make mention [in the Divine Liturgy] also of the Seraphim, whom Isaiah in the Holy Spirit saw standing around the throne of God, and with two of their wings veiling their face, and with two their feet, while with two they did fly, crying 'Holy, Holy, Holy, is the Lord of Hosts' (Isaiah 6:2-3). For the reason of our reciting this confession of God, delivered down to us from the Seraphim, is this, that so we may be partakers with the hosts of the world above in their hymn of praise.
'And forgive us our debts as we also forgive our debtors.' For we have many sins. For we offend both in word and in thought, and very many things we do worthy of condemnation; and 'if we say that we have no sin' (I Jn. 1:8), we lie, as John says...The offenses committed against us are slight and trivial, and easily settled; but those which we have committed against God are great, and need such mercy as His only is. Take heed, therefore, lest for the slight and trivial sins against you, you shut out for yourself forgiveness from God for your very grievous sins.
Never neglect reading from the Fathers. You will benefit greatly because the saints set an example for you. You see your faults and failings as if in a mirror and correct your life. Reading is like light in the darkness.
Blessed is he who remembers his death day and night and prepares himself to meet it. For it has a habit of coming joyfully to those who wait for it, but it arrives unexpectedly, bitterly, and harshly for those who do not expect it.
Live very modestly. Be very humble. Don't speak idly about humility, but be like rubbish for people to step on, if you want Christ to visit you. Your heart needs to become as soft as cotton.
For God seeks nothing else from us, save a good purpose. Say not, How are my sins blotted out? I tell thee, By willing, by believing. What can be shorter than this? But if, while thy lips declare thee willing, thy heart be silent, He knoweth the heart, who judgeth thee. Cease from this day from every evil deed. Let not thy tongue speak unseemly words, let thine eye abstain from sin, and from roving after things unprofitable.
My child, man's life is full of sorrow because he is in exile. Do not seek perfect rest. Since our Christ bore His Cross, we shall bear ours, too. If we endure all afflictions, we shall receive grace from the Lord. The Lord allows us to be tempted, so that He can test the zeal and love we have for Him. Therefore, patience is needed. Without patience a person does not obtain experience, acquire spiritual knowledge, or attain any measure of virtue and perfection.