Luke  12:1 (KJV)  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.

2 For there is nothing covered, that shall not be revealed; neither hid, that shall not be known.

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.

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.

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.

Luke 2:35 (Yea, a sword shall pierce through thy own soul also,) that the thoughts of many hearts may be revealed.

Deuteronomy 8:2 And thou shalt remember all the way which the Lord thy God led thee these forty years in the wilderness, to humble thee, and to prove thee, to know what was in thine heart, whether thou wouldest keep his commandments, or no.

Mark 7:20 And he said, That which cometh out of the man, that defileth the man.

21 For from within, out of the heart of men, proceed evil thoughts, adulteries, fornications, murders,

22 Thefts, covetousness, wickedness, deceit, lasciviousness, an evil eye, blasphemy, pride, foolishness:

23 All these evil things come from within, and defile the man.