1- Accept responsibility for your life. Know that it is you who will get you where you want to go, no one else.
Everything is in your own hands. Everything is in your control. You can get whatever you want. You can achieve every goal of yours no matter how big or small it is. You are engineered to get success in life, as a fact of the matter. The one and only reason why you have not attained success as of yet, is because you are not being responsible. You are not accepting responsibility for your life. You are dependent on others. Once you have mentally accepted the fact that your life is in your own control and you are responsible for taking it wherever you want to, you'll be on your way to success.
2- Live every act fully, as if it were your last.
I have found this quote to be extremely effective. If you apply the above words into your life, I bet your whole life will be changed. You'll be completely a new person. The point here is to live in the moment. Embrace very act big or small and live it to your highest.
3- All life is an experiment. The more experiments you make the better.
The golden thread of highly successful and meaningful life is experimenting. Experiment allows exploring new things in life. It encourages you to get out of your comfort zone and try out new things. Without experiment, you won't come out of your comfort zone, grow as a person, achieve success, and think positive thoughts. So go out and make some experiments in your life. The more experiments you do, the more wisdom you'll gain and more you grow as a person.
These are the three Motivational Life Quotes by Les Brown, Mahatma Gandhi and Ralph Waldo Emerson respectively. Don't just read them but apply them into your life and liberate the fullness of the person you really are.