即使在艰难时刻，我也努力保持积极。

You control your future, your destiny. What you think about comes about. By recording your dreams and goals on paper, you set in motion the process of becoming the person you most want to be. Put your future in good hands — your own.

"I am not a person, I am a voice."

数学的本质在于它的自由。

The only limit to our realization of tomorrow is our doubts of today.

实现明天的唯一限制将是我们今天的疑虑。