May also be of interest, if you have time. I've found Peter Van Roy's thoughts on this subject to be cogent in the past.
Rock Is Dead. Long Live Scissors!
"The presentation or 'gift' of the Holy Ghost simply confers upon a man the right to receive at any time, when he is worthy of it and desires it, the power and light of truth of the Holy Ghost, although he may often be left to his own spirit and judgment." --Joseph F. Smith (manual, p. 69)