Here you will find the Poem Sonnet V of poet George Santayana
Dreamt I today the dream of yesternight, Sleep ever feigning one evolving theme - Of my two lives which should I call the dream? Which action vanity? Which vision sight? Some greater waking must pronounce aright, If aught abides still of the things that seem, And with both currents swell the flooded stream Into an ocean infinite of light. Even such a dream I dream, and know full well My waking passes like a midnight spell, But know not if my dreaming could break through Into the deeps of heaven and of hell. I know but this of all I would I knew: Truth is a dream, unless my dream is true.