I think life is like an endlessly long toothpaste tube whose cap may suddenly appear on the horizon and then, what's more, come unscrewed without any notice whatsoever. The tube, meanwhile, will always be squeezed. It is there to be squeezed. There's always something or the other that squeezes it, gently or otherwise depending on how much the squeeze is resisted. (Whoa!) The pressure is bound to result in an excess in one place and a shortage in another.
You may temporarily believe you're free if and when the squeezing ceases for some reason. But, psst, the contents have only been moved to another section of the tube (read life). You live under the illusion that you've solved the problem and can move on to a smooth and unobstructed path. But the so-called solution, in reality, did not clear the problem forever but only moved it to some other place or changed its appearance. ;-) Your solution is now the new problem. Your problem was perhaps the solution to a previous problem. Hang on. This is not pessimism. What I am driving at is that this simply means there is perhaps no such thing as a problem or a solution. Everything is the tube.