The principle and source of the virtues is a good disposition of the will, that is to say, an aspiration for goodness and beauty. God is the source and ground of all supernal goodness. Thus the principle of goodness and beauty is faith or, rather, it is Christ, the rock of faith, Who is the principle and foundation of all the virtues. On this rock we stand and on this foundation we build every good thing.
What is the source from which man's will can draw suitable principles of guidance? For a non-believer, an answer to this is extremely difficult and essentially impossible. Are they to be drawn from science? In the first place, science is interested primarily in questions of knowledge and not morals, and secondly, it does not contain anything solid and constant in principles because it is constantly changing. From philosophy? Philosophy teaches about the relativity of its truths and does not claim their unconditional authority. From practical life? Even less. This life itself is in need of positive principles which can remove from it unruly and unprincipled conditions. But while the answer to the present question is so difficult for non-believers, for a believing Christian the answer is simple and clear. The source of good principles is God's will, and this is revealed to us in the Savior's teaching, in His Holy Gospel. It alone has an unconditional, steadfast authority in this regard; and it alone teaches us self-sacrifice and Christian freedom, Christian equality and brotherhood (a concept stolen by those outside the Faith). The Lord Himself said of true Christians, 'Not everyone who says to Me, Lord, Lord, will enter the kingdom of heaven, but he who does the will of My Father' (Matt. 7:21).
Every tribulation reveals the state of our will, whether it inclines to the right or to the left. An unexpected tribulation is called temptation, because it subjects a man to a test of his secret dispositions.
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.
When tested by some trial you should try to find out not why or through whom it came, but only how to endure it gratefully, without distress or rancor.
He is not yet a faithful servant who bases himself on bare knowledge alone; a faithful servant is he who professes his faith by obedience to Christ, Who gave the commandments.
Obedience is the medicine compounded of virtues, giving life to those who drink it, and the knife which, with one cut, cleans festering wounds. A man who, in faith and simplicity, has chosen to wield this knife, at once cuts off all passions, more completely than anyone...
The abstinent withdraws from gluttony, the uncovetous from covetousness, the silent from wordiness, the pure from attachment to sensory pleasures, the chaste from fornication, he who is content with what he has from love of money, the meek from agitation (anger), the humble from vanity, the obedient from objection, he who is honest with himself from hypocrisy; equally, he who prays withdraws from despair, the willing pauper from acquisitiveness, he who professes his faith from denying it, the martyr from idolatry – so you see that each virtue, performed even unto death, is nothing but withdrawal from sin; and withdrawal from sin is a natural action, not an action which could be rewarded by the kingdom.
Continually take careful note of your inner intention: watch carefully which way it inclines, and discover whether it is for God and the sake of goodness itself and the benefit of your soul...
He who reveres the Lord does what is commanded, and if he commits some sin or disobeys Him, endures whatever he has to suffer for this as being his desert.