Life is a series of problems.
Your most important sale in life is to sell yourself to yourself.
A healthy strong ego, with plenty of self-esteem, does not feel itself threatened by every innocent remark.
We are built to conquer environment, solve problems, achieve goals, and we find no real satisfaction or happiness in life without obstacles to conquer and goals to achieve.
When you're not goal-striving, not looking forward, you're not really living.
Live in the present. The past is gone; the future is unknown - but the present is real, and your opportunities are now.