The National Recording Preservation Board describes the song as a moving tribute to both Tupac's mother and mothers everywhere.

VOA: standard.2010.07.08

The reason for that is because all of this is connected, so we're moving electrons everywhere in the system.

这个现象的原因是因为,它们全部都是连接起来的，所以在这个系统中,电子移动到所有地方。

麻省理工公开课 - 化学原理课程节选