1. instructive - Noun
2. instructive - Adjective
Conveying knowledge; serving to instruct or inform; as, experience furnishes very instructive lessons.
Source: Webster's dictionaryBad company is as instructive as licentiousness. One makes up for the loss of one's innocence with the loss of one's prejudices. Denis Diderot
Failure is instructive. The person who really thinks learns quite as much from his failures as from his successes. John Dewey
The dignity of history consists in reciting events with truth and accuracy, and in presenting human agents and their actions in an interesting and instructive form. The first element in history, therefore, is truthfulness; and this truthfulness must be displayed in a concrete form. Daniel Webster
All poetry is supposed to be instructive but in an unnoticeable manner; it is supposed to make us aware of what it would be valuable to instruct ourselves in; we must deduce the lesson on our own, just as with life. Johann Wolfgang von Goethe
From any vocabulary of ideas we can build other ideas by formal combinations of signs. But not any set of ideas will be instructive. One must have the right ideas. Ian Hacking
To read the report of a discussion in which arguments for and against are presented, in which a subject has been covered from different points of view, with new ideas advanced - this is far more instructive than to read a brief account of the resolution passed on the matter. Fredrik Bajer