How does the cub feel in the hostile world where he lives

From the text:

"But the cub did not think in man-fashion. He did not look at things with wide vision. He was single-purposed, and entertained but one thought or desire at a time. Besides the law of meat, there was a myriad other and lesser laws for him to learn and obey. The world was filled with surprise. The stir of the life that was in him, the play of his muscles, was an unending happiness. To run down meat was to experience thrills and elations. His rages and battles were pleasures. Terror itself, and the mystery of the unknown, lent to his living."