Forgive and pray, in order to live your life serenely. And do not do to others that which you do not want them to do to you, or return the evil which they have done to you.
What should one do so that the mind might be constantly occupied with God? If we do not acquire the three following virtues: love for God and men, continence, and the Prayer of Jesus, then our mind cannot be completely occupied with God. For love makes anger meek, continence weakens fleshly desire, and prayer draws the mind away from thoughts and banishes every hatred and high-mindedness.
One must clean the royal house from every impurity and adorn it with every beauty, then the king may enter into it. In a similar way one must cleanse the earth of the heart and uproot the weeds of sin and the passionate deeds and soften it with sorrows and the narrow way of life, sow in it the seed of virtue, water it with lamentation and tears, and only then does the fruit of dispassion and eternal life grow. For the Holy Spirit does not dwell in a man until he has been cleansed from passions of the soul and body. Only one thing may remain within a man, either the Holy Spirit or the passions. Where the Holy Spirit is, there the passions do not come near, and where the passions are, there the Holy Spirit does not dwell, but rather the evil one.
When a man has been sufficiently illumined, however, to perceive his own faults, he never ceases mourning for himself and for all men, seeing God’s great forbearance and what sins we in our wretchedness have committed and still persist in committing. As a result of this he becomes full of gratitude, not daring to condemn anyone, shamed by the profusion of God’s blessings and the multitude of our sins. Thereupon he joyfully renounces everything in his own will that is counter to God, and he watches over his own senses, so as to prevent them from doing anything beyond what is unavoidably needed.
We ought to learn the virtues through practicing them, not merely through talking about them, so that by acquiring the habit of them we do not forget what is of benefit to us. 'The kingdom of God,' St. Paul says, 'resides not in words but in power' (I Cor. 4:20). For he who tries to discover things through actual practice will come to understand what gain or loss lies in any activity that he pursues.
Do not say...that one or two books is sufficient for instructing the soul. After all, even the bee collects honey not from one or two flowers only, but from many. Thus also he who reads the books of the Holy Fathers is instructed by one in faith or in right thinking, by another in silence and prayer, by another in obedience and humility and patience, by another in self-reproach and in love for God and neighbor; and, to speak briefly, from many books of the Holy Fathers a man is instructed in life according to the Gospel.
Prayer... by its action it is the reconciliation of man with God, the mother and daughter of tears, a bridge for crossing temptations, a wall of protection from afflictions, a crushing of conflicts, boundless activity, the spring of virtues, the source of spiritual gifts, invisible progress, food of the soul, the enlightening of the mind, an axe for despair, a demonstration of hope, the release from sorrow.
Always keep this in mind: you are not doing anything virtuous by your continence. Or can it be considered a virtuous act when a man who, out of his own carelessness, has been trapped deep down in a mine shaft, takes a pick and shovel and tries to work his way out? Is it not, on the contrary, quite natural for him to make use of the tools given him by a higher authority to make his way up out of the choking air and darkness? ...From this picture you can gain wisdom. The tools are the implements of salvation, the commands of the Gospel and the holy Sacraments of the Church, that were bestowed upon every Christian at holy baptism. Unused, they are of no profit to you. But used in the right manner they will open your way to freedom and light.
It took Noah a hundred years to build his ark; log upon log he dragged to the construction. Do as he did; drag log upon log to your construction, patiently, in silence, day after day, and do not inquire about your surroundings. Remember that Noah was the only on in the whole world who 'walked with God' (Gen. 6:9), that is, in prayer. Imagine the crowding, the darkness, the stench, that he had to live in until he could step out into the pure air and build an altar to the Lord. The air and the altar you will find within you, explains St. John Chrysostom, but only after you have willingly gone through the same narrow gate as Noah.
A prayer offered while one has any cause to reproach a fellow man is an impure prayer. There is only one whom the praying person may and must reproach, and that is himself. Without self-reproach, your prayer is as worthless as it is while you are reproaching someone else in your heart. Perhaps you ask: How can one learn this? The answer is: One learns it through prayer.
It is absolutely necessary that each Orthodox Christian have a knowledge of the content of his faith and its basic truths - the dogma of the Trinity, of Divine Love, the Incarnation, the saving death and Resurrection of the Savior, the future destiny of the world and of mankind, etc. These questions are not something distant and insignificant, rather they are vital and important to us, for the whole meaning of life hangs upon their answers. All these questions coalesce in one: is there a God and Who is He? These are questions of singular importance even for people who barely believe. For truly believing people, to know about God is to know what He means to us and what His will is concerning all of us. This is the basic, most important and precious knowledge in life. In fact, Orthodox life itself is defined first of all by the knowledge of God. The Lord Himself, while praying to His Father, said: 'This is eternal life, that they know You, the One True God and the One Whom You sent...' From all this, we see that the knowledge of God is our direct Christian duty, and the way to it, in addition to the study of theology, is the contemplation of God. Contemplation of God is the description of the spiritual mood in which man intentionally introduces into, maintains in his conscience, the thought of God, of His highest properties, the matter of our salvation and of our eternal future, etc. Such contemplation of God is especially loved by our Orthodox ascetics, but, unfortunately, it is not familiar to most of us. The knowledge of God is not, however, the mere rational acceptance and remembrance of our Orthodox Christian teaching of faith and life. Christianity is a living life, an experience of the human heart, and therefore it is accepted by people unequally. The more a person has experienced the truths and commandments of his faith in his personal life, in the inner experience of inner struggle and striving to live according to God’s Gospel, the deeper does he assimilate Christianity. Conversely, if a person treats his faith dryly, with external formalism, and is not guided by the appeals of Christ’s Gospel in his personal life, he will not accept Christianity into his soul and heart, and the profound content of the truths of Christ’s faith will remain alien to him.