This quote touches on the same subject as yesterday's: Control. Control is the ability to start, change and stop things at one’s own choice.
Some people think that to survive one must adapt to one's environment. The trouble with that idea is that it tends to have the connotation that one must adapt to avoid the dangers. It's a sort of "I can run away" definition. The quote above, from L. Ron Hubbard, says that you must change so you can control your environment, a very different idea.
The quote above can also be applied to entities other than species. Look at Circuit City for example. The environment (economy) changed and Circuit City was not able to change so that it could control the new situation and so it perished.
You can also apply it to your own life. Which areas are you having trouble in? How can you change to better control those areas? Change could be brought about by a decision to act differently, by education so you understand the area better or by a myriad of other ways that I will leave to your common sense.
Tell me what you find.