feel blindly

Should they feel blindly optimistic, despite the avalanche of bad news?

You showed me what to do with the strange forces I could feel blindly groping in my soul.

Up a ladder, for the rungs of which he had to feel blindly, he climbed to a perch on the cross-beams, under the eaves, and still he was as blanketed from view as a bat in an unlighted cavern.

All night I smiled as I slept, For I heard the March-wind feel Blindly about in the trees without For buds to heal.

Let our spirits stretch out all their powers to the better things beyond, as the plants grown in darkness will send out pale shoots that feel blindly towards the light, or the seed sown on the top of a rock will grope down the bare stone for the earth by which it must be fed.