The author has explained the power of self discipline in various acts of our life. We may have motivation to do certain things. That's not enough. But with self discipline, we can sustain that motivation and achieve what we aspire for. Don't just read the book. Work out the exercises which are given at the end of each chapters. This will ensure success
I was really shocked how this one simple things called self discipline is important in life. This is what really differentiates successful from unsuccessful people. A must book and very simple to read.