Jesus spoke of what he had to offer as a well being full of “water springing up into everlasting life”.
Peter warned against preachers that were “wells without water”. Their end was destruction.
May we always be conscience of what we are offering people that are searching. Whether it be advice given or doctrine preached it always needs to be rooted in the Word. 
Scripture taken from: John 4:14 & II Peter 2:17