Luke 8:9-10

8:9 And his disciples asked him, saying, What might this parable be? 8:10 And he said, Unto you it is given to know the mysteries of the kingdom of God: but to others in parables; that seeing they might not see, and hearing they might not understand.

Luke 8:16-18

8:16 No man, when he hath lighted a candle, covereth it with a vessel, or putteth [it] under a bed; but setteth [it] on a candlestick, that they which enter in may see the light. 8:17 For nothing is secret, that shall not be made manifest; neither [any thing] hid, that shall not be known and come abroad. 8:18 Take heed therefore how ye hear: for whosoever hath, to him shall be given; and whosoever hath not, from him shall be taken even that which he seemeth to have.