We are not as small and insignificant as that, on a scale of 1 to 150 [ one being the smallest particle in the whole universe - 150 being the whole thing ] each segment calculated at either 10 x bigger or smaller. We humans are relatively huge - coming in at 60 [ a grape seed is 50 ]. The problem is we cannot see or accept how important the smallest things around us are. A single microscopic strand of DNA for instance not only contains the amazing 'system operating code' [containing far more data than the largest computer on the planet] that's required to construct every individual - down to the smallest hair - it controls our behaviour, our sexuality, how long we are likely to live [not counting accidental death] and how we relate to everything around us. We are delusional to even think we have 'free will' when deep down it's our DNA 'programming' calling the shots, and explains why we make the same bad choices over and over again.
When we die the earth just reclaims the atoms that we have temporary use of, that make up our body and recycles them for the next life form to use albeit worms and plants. Atoms that were not there when we were conceived - so we cannot be our bodies - therefore logic says we are our DNA programming in transit through time.
William Shakespeare said it all in one short sentence ..."A man can eat of a fish - that fed on a worm - that fed off a king"
The 'god' concept is just a figment of man's ego - as a means to associate, and elevate him godlike above all the animals [and superior to other humans too who have differing views] Sound familiar ?