True Friends have one soul, Aristotle

Aristotle wonders about the nature of happiness, and in this study of happiness he focuses in three elements that identifies as keys for the happy man: the virtue, in special justice, the friendship and the pleasure.
Let's talk about the second: the friendship. Aristotle in his book Nichomaquean Ethics, Book VIII wrote about friendship: "is the most necessary for life. In effect, without friends nobody would want to live......But friendship is not is not only necessary but beautiful. We praise those who love their friends and having a lot of friends is considered one of the best things".
Then he affirms: "the happy life is considered to be the life according to virtue."
For what is exposed for Aristotle we can say that needing the man of the virtue for his social activity, and being the friends those with whom we primarity exercise the virtue; friendship is not the foundation of happiness, but without it (friendship) man can not achieve happiness. Friendship is necessary but not sufficient. We need both friendship and virtue.

The Spiritual Gift of Justification

The doctrine of Justification is understood by knowing that justice is necessary but not enough. Justice is a form of error because the spiritual gift of counsel is precise and accure. The practice of the virtue as Aristotle teach to us is an heresy, because happiness is an apparent good, the true good for men is the eternal life not happiness. The kingdom of God means dominion, empire of the divine perfections, the kingdom of god is not about virtue but perfections, "Be perfect, therefore, as your heavenly father is perfect", Matthew 5:48. To live according to the divine law we need a special help because justice is not sufficient, the strength of the soul is not enough to reach salvation, we need more, and this moore is the Justification,a special help, a gift from God.

We live according to the flesh or according to the spirit

The ethics has a purpose: the study of the good and the evil. The ethics explains that the good and the evil have their origin in the truth and in the falsity.Truth and falsehood are concepts previous to good and evil. Why? Because to know if something is good or bad first you have to know it, something is false when it is presented as something that is not, remember and this is important that abstraction does not admit falsehood, as in the case of mathematics.From the metaphysical point of view evil is a deprivation of good affected by falsehood, but the evil is also a discernment.We all discern, we all choose in one way or another. There is a chaotic, unjust, destructive mood of thinking to this we call bad discernment, remember the concept of natural man in 1 Corinthians 2:14-15. In the other hand there is a benevolent, uplifting, just mood of thinking to this we call it good discernment.The ways of thinking are lifestyles, we choose.The goal of sin are the false goods: happiness, good fortune, abundance of material goods; But the purpose of rectitude is the true good to achieve: the eternal life. 
In the text of Romans 6:23 wages means return, the return of the sin (law of the return, you reap what you sow).
http://www.quintoevangelio.com.ar/en/articles/item/103-we-live-according-to-the-flesh-or-according-to-the-spirit.html

Blessed are the pure in heart, for they shall see God

Jesus begins his preaching with the sermon of the mountain (Luke 6:20-23; Matthew 5:3-12), Jesus never speaks to us to seek happiness. All the beatitudes begin with the word "rejoice", "blessed", "happy". Virtue responds to the natural desire for happiness, which is the desire of the soul, because we have a soul we want to be naturally happy.

In the beatitudes the concept of happiness is different, the beatitudes respond to the desire for the good.

If we see the teachings of Jesus, happiness lies in eternal life, happiness is a promise related with the fear of God (the spiritual gift of fear of the lord is define as constancy, firmness, devotion, ecuanimity, stability). Remember the text: "Happiness is for those who fear God" Ecclesiastes 8:12.
Happiness is the result of the contemplative activity, of the maturity of man, the happiness as a goal of life is a false good
http://www.quintoevangelio.com.ar/en/articles/item/59-the-good-happiness.html

The Beatitudes

The beatitudes are the starting point of the teaching of  Jesus in the sermon of the Mountain. The beatitudes teach us the functioning of the spiritual laws.
Living according to the spirit is to live the spiritual gifts, is to search the correct (for the spiritual gift of counsel) and the best (for the mercy and the continuous improvement). The beatitudes are promises for those who choose the right path, for those who choose to live according to the spirit.
The beatitudes respond to the desire for the good, the virtues (like Justice) instead responds to the desire for happiness.
Is importante to notice that beatitudes must be read using the spiritual gift of knowledge and not the reason or to say beatitudes must be read using the progressive thinking.
The beatitudes are an expression of hope.
The beatitudes are 4 in Luke 6:20-22 and 8 in Matthew 5:3-12. Each beatitude respond to a spiritual gift, the beatitudes are the plan of god, the best expression of the kingdom of God, the empire of the divine perfections.
http://www.quintoevangelio.com.ar/en/articles/item/263-the-plan-of-god.html