John 3

 As Nicodemus was taught concerning the necessity of being born again, the Savior said - 

"The wind bloweth where it listeth, and thou hearest the sound thereof, but canst not tell whence it cometh, and whither it goeth: so is every one that is born of the Spirit."  (John 3:8)

The Lord teaches a great doctrine here.  The Spirit will teach us at one point what we should do.   The test will be if we follow those impressions or not.  If we do, we are more than likely to be taught again.