In the New Testament in the teachings of Jesus, it is very clear
that earthly illusions form the basic dangers in man's way.
It is easier for a camel to go through the eye of a needle, than for a rich man to enter into the kingdom of God. (M't:19: 22-24)
Jesus is pointing to the fact that man tends to deviate from his prime goal, by focusing on the accumulation of wealth. He can be unjust not only to others, but also to himself. He is apt to lose the connection with God, for his loyalty would be to what he gives an absolute value. For Jesus, the ultimate goal of life is for man to treasure his relationship with God:
..lay up for yourselves treasures in heaven, where neither moth nor rust doth
corrupt, and where thieves do not break through nor steal:
Jesus wanted his disciples to be aware of the spiritual treasure that they may lose if they deviate from God's Path as represented by following Jesus.
And every one that hath forsaken houses, or brethren, or sisters, or father, or mother, or wife, or children, or lands, for my name's sake, shall receive an hundredfold, and shall inherit everlasting life. (M't:19:29)
For what is a man profited, if he shall gain the whole world, and lose his own soul? or what shall a man give in exchange for his soul? (M't:16:26)
Jesus pointed, in different ways, to the problems that man faces on earth. Man tends to forget that there is a Divine Will that he should trust.
Behold the fowls of the air: for they sow not, neither do they reap, nor gather into barns; yet your heavenly Father feedeth them. Are ye much better than they?
Which of you by taking thought can add one cubit unto his stature?
And why take ye thought for raiment? Consider the lilies of the field, how they grow; they toil not, neither do they spin:
And yet I say unto you, That even Solomon in all his glory was not arrayed like
one of these.
Forgetting the Divine Will reduces man's ability to discern between true and false. He will be tempted to follow the wrong path, and the "words of the Lord" may not find a place in his heart. Temptations, Jesus says, are like a "thorn" that hinders the "seed" from healthy growing:
he that heareth the word; and the care of this world, and the deceitfulness of riches, choke the word, and he becometh unfruitful. (M't: 13: 22)
Jesus guided his disciples to look at life from the right perspective, for then all their actions will be like a strong and deep base of a house that can not be shaken because the word of God has turned into part of their own well rooted being. While those whose actions are distracted in the wrong direction, will gain nothing but easy ruin:
He such as who built an house, and digged deep, and laid the foundation on a rock: and when the flood arose, the stream beat vehemently upon that house, and could not shake it: for it was founded upon a rock.
But he that heareth, and doeth not, is like a man that without a foundation built an house upon the earth; against which the stream did beat vehemently, and immediately it fell; and the ruin of that house was great. (Lu:6: 48, 49).
Man needs Gods support all the time to be able to keep the right perspective to life. He should recognize his imperfection, for whatever he does, he may lose the way. Therefore, when Jesus began to preach he started by saying
"Repent: for the kingdom of heaven is at hand" (Mt:4:17)
Repentance is a continuous process, in which man seeks being freed from possible devotion to anything but God. Being aware that he is exposed to deviation makes man feel the need to repent: to continually review his handling of any aspect of life. Repentance is also a way of getting over evil self.
In the New Testament, Jesus guides his disciples to distinguish between actions and feelings that reflect "pure hearts" and those, which reflect impurity:
"out of the abundance of the heart the mouth speaketh." (M't:12:34)
"A good man out of the good treasure of the heart bringeth forth good things: and an evil man out of the evil treasure bringeth forth evil things." (M't:12:35)
"Out of the heart proceed evil thoughts, murders, adultery, fornication, thefts, false witness, blasphemies". "These are things which defile a man" (Mt:15:19:20)
A good heart is a loving heart. Confirming the teaching of Moses, Jesus related between love of God and Love of people:
thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind, and with all thy strength"
Thou shalt love thy neighbour as thyself.
There is none other commandment greater than these. (M'r:12:29-31).
On these two commandments hang all the law and the prophets.
"Love of the Lord" and devotion to Him is expressed mainly in "love of one's neighbor", and even "love of enemies".
Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
That ye may be the children of your Father which is in heaven: for he maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust.
For if ye love them which love you, what reward have ye? do not even the publicans the same?
And if ye salute your brethren only, what do ye more than others? do not even the publicans so?
It is a great struggle to be devoted to God alone and forget all about one's ego. Once man succeeds, the inner self will be awakened and related to the whole. From that perspective Jesus told his disciples that every good thing that man does to his human brethren reflects his love to God. When he gives meat to "an hungred, drink to a thirsty, takes in a stranger, clothe a naked, visits a sick, comes to a prisoner"(M't:25: 34-40), he actually feels that he is doing for God's sake.
Verily I say unto you, Inasmuch as ye have done it unto one of the least of these my brethren, ye have done it unto me. (M't:25:40)
Jesus does not only ask people to be good to one another, he wants them to be tolerant, loving and forgiving. It is through establishing the relationship of Love between man and God that man can tolerate and forgive. In treating people in such a kind way, man devotes himself to God.