Suicide and the Sirens

I heard a month ago on NPR a thing on depression/suicide, and one of the guests made a comment about how in some extremely depressive states a person is likely to attempt suicide because of a near total lack of energy to make the attempt (i.e. confined to a bed) but it's when they rise slightly from the depression where they get the energy to make the attempt -- and how this situation mirrors Odysseus tied to the mast and if he were to have been untied (given the impetus) he would have gone to his death to the Sirens.

More insights please.