What this hexagram is about
Thunder rolls beneath Heaven and all things follow their nature — the image of freedom from falsehood. It speaks of following the natural order and harboring no improper designs: do honestly what ought to be done, for to act wantonly invites disaster.
The Judgment 卦辞
无妄，元亨利贞。其匪正有眚，不利有攸往。
Supreme success; favorable to persevere. If one is not upright, there is calamity, and it is not favorable to go anywhere.
The Image 大象传
《象》曰：天下雷行，物与无妄；先王以茂对时，育万物。
Thunder rolls beneath the heavens, and all things follow without falsehood; so the ancient kings, rich in accord with the seasons, nourished the myriad things.
Commentary on the Lines 小象传
无妄之往，得志也。
Going forward without falsehood — the will is fulfilled.
The Six Lines (hover over the figure above)
Nine at the top无妄，行有眚，无攸利。
Already true and without falsehood; to act wantonly and press on now would only court trouble — there is nothing to gain.
Nine in the fifth place无妄之疾，勿药有喜。
A small affliction come without cause: take no medicine, and it mends of itself, to one's joy — for holding to the right dissolves it.
Nine in the fourth place可贞，无咎。
So long as one holds to what is right, there is no fault.
Nine in the third place无妄之灾，或系之牛，行人之得，邑人之灾。
Calamity out of nowhere: a passerby leads off the ox tethered by the road, and the townsfolk bear the blame for its loss.
Six in the second place不耕获，不菑畬，则利有攸往。
To plow without scheming for the harvest, to clear new ground without scheming for gain, but simply to do one's part in season — so it is fitting to have somewhere to go.
Initial Six无妄，往吉。
To go forward free of falsehood, true and without deceit — good fortune.