Life can be of course very hard to live, to be honest life is very tiring, almost everyone reached a certain stage where they get tired of life or living but the difference is that some give up and some did not. These are the few quotes one can live by if one ever get tired of live or failed;
The greatest glory in living lies not in never falling, but in rising every time we fall. -Nelson Mandela
The way to get started is to quit talking and begin doing. -Walt Disney
Your time is limited, so don't waste it living someone else's life. Don't be trapped by dogma – which is living with the results of other people's thinking. -Steve Jobs
If life were predictable it would cease to be life, and be without flavor. -Eleanor Roosevelt
If you look at what you have in life, you'll always have more. If you look at what you don't have in life, you'll never have enough. -Oprah Winfrey
If you set your goals ridiculously high and it's a failure, you will fail above everyone else's success. -James Cameron
Life is what happens when you're busy making other plans. -John Lennon