Although there are inevitable pains and sufferings in life, the poet thinks it is worthwhile to live, and he is willing to live it again if given the opportunity, which shows the poet's love and cherish for life and also expresses his optimistic and positive attitude towards life.
The thinking and pursuit of love, knowledge, pain and life in the poem "Why I Live" expresses human love and cherish, as well as an optimistic and positive attitude towards life.