One theme from Rikki Tikki Tavi would be courage. Rikki has to fight<span> two cobras, Nag and Nagaina, to protect his garden and Teddy. He is frightened of them because they are stronger and bigger than he is, but he overcomes his fear and fights them anyway.</span>
I think genital is supposed to be gentle. If it is, there's a poem called "Do not go gentle into that good night" by Welsh poet Dylan Thomas.