There is a saying that there’s always light at the end of the tunnel. If you enter a tunnel, you will observe that on the inside of the tunnel there is darkness everywhere. However, if you continue to walk, after sometime you will begin to notice some light in the front. When you complete your journey, you will find yourself in complete light and open air.
The tunnel is an example from the physical world. The same example is applicable to the human world as well. Life is a journey. There is no smooth road through this journey. In this path everywhere there are problems, unwanted situations and sometimes darkness.
Why are there difficulties along every road to a destination? This is for your own betterment. Difficulties give you experience, make you sincere with regard to your goal and enhance your creativity.