You will only get what you put into it

Sooner or later it is clear to you that you will reap what you sow. It is true that you will only get out of it what you put into it. If a farmer planted only trees instead of mostly vegetables then instead of harvesting food he would create a forest. The Three Little Pigs are a good example. Building a house out of material that won't withstand the Big Bad Wolf won't save them from the Big Bad Wolf. If you want to reap the benefit for all your hard work then you will have to make sure what you do will reap the benefits that you are after.