Complex sentence: While Spalding criticized what he saw as failings of the church in relation to the working class, he was sensitive to any division his opinions may have caused among his brethren, but he didn't not alter or cease speaking out for what he thought was right.
Split into simpler sentences: While Spalding criticized what he saw as failings of the church in relation to the working class, he was sensitive to any division thar his opinions may have caused among his brethren. However, he refused to alter or to cease speaking out for what he thought was right.