Four short lines carry a big idea: the past doesn't stay buried. The speaker says a touch can hold a memory, and a voice can stir up feelings that seemed finished. Nothing here is forgotten, only waiting for the right trigger.
The third line imagines meeting someone again as an "inevitable kiss," as if the speaker feels pulled toward that person no matter what. It sounds both romantic and a little helpless. The last line is the most interesting. The speaker says forgetting is a lie, which suggests that pretending to move on doesn't work. Then comes "Ignorance is the bliss," which could be read as bitter or wistful. Judging by the tone, the speaker may wish they could stay unaware, but knows they can't.
The mood is quiet, intimate and slightly aching. The simple, slightly broken English gives it a raw, spoken feel, like a private thought said aloud.