You should love and take care of yourself because after all, it is your own life.
要学会爱自己，照顾自己，毕竟生活是你自己的。
From "The Notebook".
It is your own life, you must give it some meaningful things so that it could be as unique as your fingerprints.
But how to? It is quite difficult to figure out what are the most important things in our life and it might be impossible to just concentrate our attention on those things.
Finding your own unique path can take time and involve a lot of trial and error.
The process of becoming your true self lasts throughout a lifetime.
Our personalities, interests and abilities are not set in stone.
Humans are adaptable creatures, and we are always capable of change.
However, in order to change our lives or ourselves, we have to better understand ourselves first.
A man is not old until regrets take the place of dreams.
直到后悔取代了梦想，一个人才算老。
This quote comes from John Barrymore, a famous actor.
And I think it is indeed a healthy reminder that tells us age can often be more of our attitudes than a tally.
Actually in my fields, many significant breakthroughs are maken by people at their 40s.
Aging doesn't mean we are down and out, and we should count our dreams and accomplishments, nor our years.
When I hit my 30 and I was so deprssed, but now I find I have enjoyed my 30s more than my 20s.
So, just get better at sutff and life would become easier and more interesting.