explain the significance of the poem's title in relation to its main idea (tears idle tears)

Tears, Idle Tears” was composed on a visit by Tennyson to Tintern Abbey in Monmouthshire, a locale also taken as subject for a poem by another famous English poet, William Wordsworth. Tennyson said the poem was about “the passion of the past, abiding in the transient,” which also may provide insight into the final line about “Death in Life.”