As long as you live, from this day onwards, you are able to analyze your every success and every failure — that is, if you form these principles indelibly in your memory.
You might develop and sustain a permanent positive mental attitude by making it your duty to adopt and apply these principles in your day-to-day living.
There's no other known technique by which you might keep your mind positive.
Analyze yourself bravely, now, and learn which of these precepts you have been utilizing and which of them you've been overlooking.
In the future examine both your successes and your allures, utilizing the principles as a measuring system, and really soon you'll be able to lay your finger on what has been holding you back.
If you have positive mental attitude and don't succeed, then what? If you utilize positive mental attitude and don't succeed, it might be because you're not using it the right way in the combination for success to accomplish your particular goal.
Initially it might be hard to comprehend and apply the principles. However as you continue to read each of these precepts will be more clear to you. You'll then be able to utilize them.