Malice and evil
To be malicious means to have hidden agenda, a mind to act against another person for whatever reason, while evil is the expression of that malice. Paul wrote that we should be babes in malice but in understanding we should men (1Corinthians 14:20, Ephesians 4:31). That means we should be inept when it comes to holding grudges, to walking in malice. It is the same thing when Jesus said that he was sending us to the world as sheep among wolves, but we should be as innocent as doves but as wise as serpents (Matthew 10:16).
As doves we soar above all the fleshly things, encumbrances, and traps. And as serpent we are able to navigate amidst the landmines of human peculiarities, sly in our approach.
The bread for the Passover is specially made without leaven. And Jesus warned the disciples that they should beware of the leaven of the Pharisees which is hypocrisy (Luke 12:1). Hypocrisy is about being double-faced, it is putting up an act, and it is about deception, which is a prime character of the devil.
The devil disguises as an angel of light (2Corinthians 11:14) and when the devil as a serpent showed up in the Garden of Eden it he was not scary (Genesis 3). The serpent probably had a glossy look which hides a poisonous tongue. He looked good afar off, but if you give him a chance to come near, deceptively, he strikes.
For the Pharisees, Jesus said that they are like white-washed sepulchres, who are holy on the outside but full of rottenness on the outside (Matthew 23:27). They hide corruption on the inside while telling others of the need to be holy.
Jesus came so that we do not have to live a double life, so that we can be clean in our hearts and in our lifestyle. We cannot change ourselves, so he has come to change us, to reject him is reject to possibility of real change. No other person can reach into our heart and rid it of the principle of sin and death, the evil, the poison lurking there.
Cain the first child of the first family is the epitome of malice and evil (Genesis 4:1-16). He and his brother offered sacrifices to God, but rather than change when his own sacrifice was not accepted, rather than repent, he decided that Abel was a competition for the affection of God and he decided to decide to get rid of him, kill him.
He did it full of malice and evil. The bible says that where there is envy, there is confusion and every evil work (James 3:16). So malice gives the platform for the perpetration of evil. That is why Paul enjoined us to be uninformed, ignorant when it comes to malice, because there is no way the love of God will flow from us when we harbour malice against another person, when we harbour un-forgiveness.
All these found their first house in Cain, and in this day and age the spirit of Cain is implicated when we see these traits manifest. That means that if we allow ourselves to dwell on unforgiveness, we have opened the door for the spirit of Cain, the first one who was host to these satanic traits, in opposition to the personality of God.
What did Cain get for allowing himself to be filled with hatred which eventually led him to commit murder? He lost the presence of God, and became a vagabond on the earth. That means he lost his rest, becoming perpetually agitated.
Sincerity and truth
Opposed to malice and evil, we have sincerity and truth. Again and again we hear Jesus say: truly truly I say to you. He is the truth. In Jesus, God became open to man again. Jesus said that if we have seen him we have seen the father.
Sincerity have to go with openness, while truth has to do with knowledge. The two go together. You cannot receive the truth of God without sharing his oneness, his heart of sincerity.
Jesus said of Nathanael, this is an Israelite indeed, in whom there is no guile and he was marked for a greater revelation from God. Jesus said that he will see the heaven opened and he will be privileged to see Jesus in his glory (John 1:45-53).
To the limit that you are committed to truth, saying it, living it, you qualify for divine revelation. David said: God desires truth in the inward part (Psalm 51:6). Then he said in the inward part he will make us to know wisdom. Without any commitment to truth we would not have the door of wisdom opened to us.
Sincerity has to do with purity, single-mindedness, being single-eyed, a living in total truth in God, without doubt.
James says that if anyone seeks wisdom, he should come to God, who gives without holding back (James 1:5-8), but we should ask in faith, not doubting because anyone who doubts, who does not come with a sincerity of trust full trust in God will not receive anything from God.
The Pharisees were shut off from the truth of Jesus because they threw sincerity out of the window. They were hypocrites (Matthew 23:14), they could not care for the truth, only for maintaining only holding to their position, their place of prestige in the eyes of the people, and not in the eyes of God.
There was some bright spots among them like Nicodemus, who through could not risk openly identifying with Jesus, still a sincere hunger for truth. From his sincere seeking of Jesus acknowledging that God had really sent Jesus, as a teacher, he got an instruction that we have been feeding on since: except a man be born again, he cannot see the kingdom of God (John 3:1-8). A man of hunger for truth and sincerity, always draws revelation, truth from Jesus, who does not want to cast his pearls before swine (Matthew 7:6). You must really express value for it to get it, in sincerity.
The reason many people will not be able to receive the truth of God is because they already think they know what can be known, maybe unconsciously. To receive you have to open your hands, be emptied of your thoughts.
When you add leaven to the flour it complicates it. The bible says blessed are the pure in heart because they shall see God. To be pure in heart is to be sincere, to have God as your only source, your only passion. It is in that state that you can see God. You can only see God when you are rid of ulterior motives. The bible says some people ask and do not receive because they ask to spend it on their lusts. They do not receive because of impure motives.