You might want to start by thinking about personal responsibility. We have to take responsibility for our own actions, as oftentimes our situation or circumstances are dictated by those very actions. If someone were to cheat on a test, then fail after getting caught, who is at fault? Certainly not the teacher that caught that person; rather, it's the student who cheated. Likewise, if you decide that you're late for work and speed, you have only yourself to blame when the police pull you over and issue a ticket.
As you make your bed, so will you lie in it. In other words, you have to deal with the consequences you bring upon yourself. This goes back to responsibility, because the person who must deal with those consequences is directly responsible for having caused them in the first place.
We in American culture tend to come from an individualistic perspective, where we see ourselves as being in control of our own destinies. This quote is a reflection of that social construct. It could be argued that not all cultures maintain that same internal locus of control. Other non-western cultures, for example, believe that certain external forces beyond our control shape our destiny. In such thinking, some things in life are predetermined or built in to the nature of things. The quote, in such a case, might be changed to say, "As your bed is made, you must lie on it." I bring this up only to offer an alternative perspective to consider, so that your analysis of the truth of the statement at hand takes into account the cultural biases underlying it.