by Charles Spurgeon . A man cannot be enlightened by the Holy Spirit if he sometimes says yes and sometimes says no . The Spirit never says one thing at one time and another thing at another time . Indeed there are many good men who say both yes and no , but their contrary testimonies are not from God the spirit . God the Spirit cannot witness to black and white , to a falsehood and a truth . It has always been held as a first principle that truth is one thing . Some persons say , " If I find one thing in one part of the Bible and another thing in another part , and though it contradicts itself , I must believe it . " All quite right , friend , if it did contradict itself , but the fault is not in the wood but in the carpenter . Just as many carpenters do not understand dovetailing , so it is that many preachers do not understand dovetailing . It is very nice work , and is not easily learned . It takes some apprenticeship to make all doctrines fit neatly together .