No man, for any considerable period, can wear one face to himself and another to the multitude, without finally getting bewildered as to which may be the true.

A physical symbol system has the necessary and sufficient means for general intelligent action.

Immature love says: 'I love you because I need you.' Mature love says: 'I need you because I love you.'

货币联盟不仅仅是经济问题，还涉及政治以及各国为更大稳定性而放弃部分主权的意愿。