COMMENT: In all the sub-chapters cricket brings to every match, the greatest mysteries belong to the subtlety of a world-class spin-bowler.
We wince at the threats from fast-bowlers but note the amount of body armour batsmen wear to reinforce their confidence and choice of shot against the speedsters.
None of that protection helps against the tweakers, men like India's Kuldeep Yadav, whose left-arm slows float down the track and turn the batsmen's minds to mush, as Pakistan's leg-spinner Yasir Shah did to the New Zealand batsmen this week.
Shah created an hour of chaos in Dubai as NZ collapsed for 90 in their first innings to send the side to an inevitable defeat and the series to next week's decider in Abu Dhabi.
Shah bowled superbly with his variations of speed, drift and turn, but the NZ batsmen, apart from captain Kane Williamson in the first dig, then Ross Taylor, Henry Nicholls and Tom Latham in the second, looked like newcomers to the game against a veteran. They were mentally fried and unable to find the rudiments to combat the leggie.