Always be yourself, express yourself, have faith in yourself, do not go out and look for a successful personality and duplicate it.
Ever since I was a child I have had this instinctive urge for expansion and growth. To me, the function and duty of a quality human being is the sincere and honest development of one's potential.
Notice that the stiffest tree is most easily cracked, while the bamboo or willow survives by bending with the wind.
If you always put limit on everything you do, physical or anything else. It will spread into your work and into your life. There are no limits. There are only plateaus, and you must not stay there, you must go beyond them.