如何将这句话翻译成英文？？？

He who can't choose his starting of his life,should has the courage to fight to the end.
"走完"我觉得用"fight to the end"更有气势一点.

one can't decide when to begin his life,but he should have the courage to finish it!

men may not choose how to start their lives,but they must be brave to go until the last steps they take.