It is usually in the knowing of a thing that one will know for sure what they really are getting for their time and sweat.
The things we all crave are mostly known to us in some ways, whether consciously or subconsciously.
Man by nature is complex and mostly inadequate. He is either on the quest to get little, much or much more than he is meant to have. By nature, he is selfish, self centered, wicked and conning. He is what you can call despicable to self and usually self destructive.
In knowing, we make decisions and those decisions we make are usually one of self-serving purpose. No man likes their neighbour as themselves and no matter how we say it and try to make ourselves believe it, we are first selfish and wicked.
So, what do you know and why are you doing what you are meant to be doing?