Sentence:  Fifteen years ago , troubled by the rising tide of materialism in the post-war world , a businessman and a minister asked themselves if there might not be a place for a small magazine in which men and women , regardless of creed or color , could set forth boldly their religious convictions and <WSD>bear</WSD> witness to the power of faith to solve the endless problems of living . 
Meaning of the word marked with <WSD> tags:  provide evidence for