I don't think it is a negative topic...rather a discovery of ones self and our surroundings. I would say uncertainty as a broad aspect that makes life harder. One day at a time, right;-)
"The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts." Bertrand Russell
thank you all for your participation, and i'm sorry for replying so late .
in my opinion and as answer for PuMa quastion i say :the life gets harder when you dont know if your life is going to be better or worse tomorrow , and for PuMa quastion i say: different answers from different people who live in different places are giving you good experience which helps you to "rectify" your life and make it the best