Why do you think the poet has used so many ‘negatives’ to make his statement?

The poet has used multiple negatives in the poem to make his statement because by mentioning the negative aspects of Love, he can highlight the positive aspects more firmly. In the context of the poem, the poet has pointed out the negative events that are believed to be the consequences of love and emphasized the fact that love is not limited to physical, or earthly boundaries such as physical appearance, hearts etc. but goes beyond Time itself.