Wisdom is neither easily found, nor painlessly acquired.  If we seek it out, it is likely to present itself to the prospector in a way that conceals its true utility.  In the same way that precious metals and gems are distributed unevenly and clandestinely among geologic sediments, so is wisdom often submerged in quantities of intervening irrelevancies, or cloaked in a sheen of protective coloration.  For wisdom—prudentia—knows that only the truly worthy will bring to bear pickaxe, shovel, and grindstone to extract, refine, and polish her secret ores for all the world to see.