The present is the past rolled up for action, and the past is the present unrolled for understanding.

音乐可以治愈心灵，我希望我的歌可以帮助人。

In the context of computational learning, the concept of 'probably approximately correct' (PAC) learning provides a framework for understanding the efficiency and feasibility of learning algorithms.

音乐让我学会了坚持和感恩。

The best way to measure how much you've grown isn't by inches or the number of laps you can now run around the track, or even your grade point average - though those things are important, to be sure.It's what you've done with your time, how you've chosen to spend your days, and whom you've touched this year. That, to me, is the greatest measure of success.

Happiness is beneficial for the body, but it is grief that develops the powers of the mind.