Ok, so I'm not sure here, but my reading of this comic is that the ant on the right is trying to get his friend on the left to jump over that crack before the truck runs him over. The ant on the left is too paralyzed by fear to even consider jumping over the crack, on account of his Catholic upbringing filling him with so much guilt on the subject of cracks. The ant on the right is a Hegelian, though, so he feels that the left ant should be able to choose his individual communion with his creator over the specialized dicta of his upbringing. The ant on the left is left with a complicated set of emotions, religious fears, and a general sense of unease and foreboding at the sudden challenge by the other ant of his world views. The ant on the right is pressing the issue with an optimistic outlook on the future of ant-kind and the possibility of pushing away from organized religion into a deterministic spirituality which allows for conscious choice from within the dictates of the individual soul. The left ant worries that individualism is counter to the dictates of his notions of right and wrong, and fears he wouldn't understand his place in society without the familiar constructs and constrictions of his prescribed world view.
Then they're both run over by a truck.
Admittedly it's been a few years since I drew this, but I'm pretty sure that's what it was.