What mood does henry wadsworth longfellow’s use of repetition in “the tide rises, the tide falls” to create?

Henry Wadsworth Longfellow wants to create a calm mood, leading the reader into the acceptance of the fact that humans will eventually die, while nature is immortal. This mood is given by the poetic devises used, such as: repetition of the title, personification, imagery, the rhyme scheme, alliteration, and assonance. 

The career that i have* decided to present this year is photography. photographers use both aritficial and natural lighting*use a transition sentence when going into the 2nd paragraphso.. photographer? *in order for me to be a photographer* scratch "accomplish this ranking" then say, i must first.. and continue on the sentence instead of different use various*