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I believe that you can only tell that you're on the right path in life if you encounter difficulties. All important breakthroughs in life came after a difficulty.
Take a video game for example, you might be lost in a particular level, wandering but once you come across a bad guy, you automatically know that you're back on track.
I believe that the same applies in life, those difficulties are there to sharpen you, mould you, and make you a better person that will handle your future success.