Pain can be instructive if you are able to learn from it.
The word that has the definition for providing information instructive is "educational."
instructive
There are LARGE CRYSTALS....
Instructive language is language that is used to give instructions or guidance on how to do something. It is clear, direct, and often focuses on providing step-by-step directions to help someone complete a task or action. Examples include recipes, manuals, and tutorials.
Instructable and instructive are adjectives.
Instructive or educational.
An apothegm is a short, witty, instructive saying.
instructive sentence
The tone is reassuring and instructive.
every theme concerned with an instructive activity is didactic.
A prompt
An apothegmatist is a person who creates apothegms - short, witty, instructive sayings.