You can't hit what you can't see.
Source, in full
As quoted in "Johnson's Great Speed Dazzles Pirate Hitters" by Damon Runyon, The San Francisco Examiner (October 8, 1925), p. 33 / Ever since its mention in Runyon's syndicated column, Bodie has been frequently been cited as the first to apply this truism directly to Johnson. However, as early as May 8, 1912, Eddie Collins was quoted doing so.