Several people have made this point in different ways, including Viktor Frankl, Steven Covey and Peter Block.
Ultimately, man should not ask what the meaning of his life is, but rather must recognize that it is he who is asked.
In a word, each man is questioned by life; and he can only answer to life by answering for his own life; to life, he can only respond by being responsible.
Credit: Viktor E. Frankl