"Sift you as wheat"

Wheat is harvested by rigorously shaking it in a large sieve. Said to Peter by Christ in Gethsemane. 

Ponder "Shaken " testimony. Peter was to go through many trials and would be shaken.

Testimony vs conversion.

"...thou shalt thrice deny that thou knoweth me" to Peter.  Christ phrased it as a commandment.  " Thou shalt"....to ponder.

"Invest time in learning about saviour and Jesus Christ" Pres Nelson