Determine the following passage is an argument. Identify the conclusion. For those that are not, determine the kind of non-argument.
If a man holding a belief which he was taught in childhood or persuaded of afterwards keeps down and pushes away any doubts which arise about it in his mind, purposely avoids the reading of books and the company of men that call in question or discuss it, and regards as impious those questions which cannot easily be asked without disturbing it-the life of that man is one long sin against mankind.