Thoreau writes in his journal:
We are all pilots of the most intricate Bahama channels. Beauty may be the sky overhead, but Duty is the water underneath. When I see a man with serene countenance in the sunshine of summer, drinking in peace in the garden or parlor, it looks like a great inward leisure that he enjoys; but in reality he sails on no summer’s sea, but this steady sailing comes of a heavy hand on the tiller. We do not attend to larks and bluebirds so leisurely but that conscience is as erect as the attitude of the listener. The man of principle gets never a holiday. Our true character silently underlies all our words and actions, as the granite underlies the other strata. Its steady pulse does not cease for any deed of ours, as the sap is still ascending in the stalk of the fairest flower.