Experience without theory is blind, but theory without experience is mere intellectual play.
Immanuel KantThere may be Peace without Joy, and Joy without Peace, but the two combined make Happiness.
John BuchanThe soul without imagination is what an observatory would be without a telescope.
Henry Ward BeecherProsperity is not without many fears and distastes; adversity not without many comforts and hopes.
Francis BaconHappiness is neither without us nor within us. It is in God, both without us and within us.
Blaise PascalThat which can be asserted without evidence, can be dismissed without evidence.
Christopher Hitchens