Sins revealed Luke 12:1 In the mean time, when there were gathered together an innumerable multitude of people, insomuch that they trode one upon another, he began to say unto his disciples first of all, Beware ye of the leaven of the Pharisees, which is hypocrisy.
In the mean time, as the Pharisees asked him question after question looking for a reason to condemn him. A great crowd assembled. They were stepping on each other to be where the action was. This was the entertainment of that time: Jesus speaking to the Pharisees. Jesus spoke to his close disciples: beware of the leaven, the sin of the Pharisees. What sin? Hypocrisy. They wished to trick Jesus, they were not sincere in their questions.
Luke 12:2 For there is nothing covered, that shall not be revealed; neither hid, that shall not be known.
Jesus knew their hearts, all sins will be revealed.
Luke 12:3 Therefore whatsoever ye have spoken in darkness shall be heard in the light; and that which ye have spoken in the ear in closets shall be proclaimed upon the housetops.
You can't hide your sins from God, they all will be made public.
Luke 12:4 And I say unto you my friends, Be not afraid of them that kill the body, and after that have no more that they can do.
Jesus speaks to his close friends, saying, do not be afraid of these hypocrites, they cannot touch your soul. They will pass away as will all flesh, then they will cry out to God, and he will not hear them, because they rejected His Son. So proud they are now, but they will see their lack. Fear them not.
Luke 12:5 But I will forewarn you whom ye shall fear: Fear him, which after he hath killed hath power to cast into hell; yea, I say unto you, Fear him.
Fear God, not man. Receive Jesus by faith and become children of God. This is a better way for you then the way of the legalizing Pharisees and lawyers. In Jesus we are free, in him we are forgiven of sins. No other kind of law keeping will bring eternal life, but instead, judgment and separation.