And that's why they come to feel much more keenly in them selves the impulse towards a perfection that is higher, which impulse is implanted in their rational nature by the Creator Himself. Nature. 463 (7279): 270. 21 January 2010. Bibcode:2010Natur.463..270.. 75 n. 12 Whitelock (1969) p. Williamson (2017) p. 1103 Whitelock (1969) p. 132 §§ 3146-3158 Thurnam (1857) p. Bell (1938) p. 194 Thurnam (1857) pp. 141-142 Bell (1938) pp. Bell (1938) pp.