I think I get the first verse:
Its talking about a cat leaving the home and trying to survive on its own. The owner tries to do what they can to help even though it might not be enough and can't even do that much with what little they have. As being someone who lost their home I can feel this one.
The second one confuses me but I'll try to understand:
Jesus christ is usually a metaphor for a martyr but I don't see one. If their not my own then does that mean its someone else's? Who else could it be referring to? Opening the window could be a euphemism for the need to steal and that Jesus segment is saying we should try to forgive them. Or maybe I completely missed the point?