Don't compromise your morals. --- There were some people in my life who did compromise themselves (and DEFINITELY their morals), rather than change the dickheads around them. Oh well, THEIR loss, not mine.
Until God opens the next door, praise him in the hallway. I think this quote is just a cliche and doesn't mean much to anyone until they find themselves in a hallway and see how difficult it can be to trust and praise God in times of waiting.