Napoleon applied himself with more zest to his studies, in the hope of speedily qualifying himself for the artillery.
His approaching departure did not prevent his amusing himself, but rather gave zest to his pleasures.
While maintaining intact its religious attitude and its theory of knowledge, it returned with new zest to scientific studies, especially the study of the old philosophers.
The list of explorers since 1875 is a long one; but after Forrest's and Giles's expeditions the main object ceased to be the discovery of pastoral country: a new zest had been added to the cause of exploration, and most of the smaller expeditions concerned themselves with the search for gold.
This high physical zest in life seems to have declined after 1831, when his eyes began to trouble him, and he became liable to depression.