To paraphrase our forefathers: Happiness is not the absence fo problems, but the ability to cope with them. The following examples can illustrate this viewpoint.
For example, Mandera, a well-known African political leader, suffers countless misery and faces a series serious problems. However, he is a happy man and easy to admire. Because he eradicates the inequality in Africa and makes a disproportionately contribution to African development.
Take a look around ourselves. The number of students who taking part in the entrance examinations for the postgraduate schools has swollen by about 11% every year. They confront with various problems including learning, psychology, and health. But they still are happy. Because with the help from WenDu the students can develop the ability to address all problems.
To ensure to develop this ability, you can do a lot. For instance, if you are reluctant to tackle problems, you can change thinking mode and eradicate pessimistic attitudes.