A key word is "tend". I've tried to learn from past failures only to realize that the world has changed in a few short span and my lesson no longer applied. In

A key word is "tend". I've tried to learn from past failures only to realize that the world has changed in a few short span and my lesson no longer applied. In the immortals words of a song "what was once good, now is bad". When one realizes this, life gets a bit harder.