宁可信其有不可信其无
Better to believe the worst, and be pleasantly surprised, than to be optimistic and learn the worst.
Better to be sure than sorry.
Would rather believe in it than do not believe in it
对应有条英语谚语:
Better to be sure than sorry
Rather believe it to be truth than not
Better believable than not.
呵呵,按照Better late than never套的,
参考一下:)
http://www.china-nurse.com/2006/11-7/38380.htm