It doesn't. In this context, "...that I believe all living things", the words "I believe" can be directly converted to "I have faith without any evidence".
> It is for beauty like this that [I believe][I have faith without any evidence] all living things were originally designed by some intelligence, somewhere.
Looks like this for is as in "because", he is telling you why he belives, because of "beauty like this". You can only say you do not believe this evidence implicates that.
Looks like this for is as in "because", he is telling you why he belives, because of "beauty like this". You can only say you do not believe this evidence implicates that.