No gun is perfectly true. So the marksman, that he may hit the bull's-eye, points elsewhere.

They will listen with both ears to what is said by the men just a step or two ahead of them, who stand nearest to them, and within arm's reach. A guide ceases to be of any use when he strides so far ahead as to be hidden by the curvature of the earth.

Evolution pays and that is why there is evolution

We despair of changing the habits of men, still we would alter institutions, the habits of millions of men.

Nature is full of by-ends. A moth feeds on a petal, in a moment the pollen caught on its breast will be wedding this blossom to another in the next county.

Error held as truth has much the effect of truth. In politics and religion this fact upsets many confident predictions.

Form may be of more account than substance. A lens of ice will focus a solar beam to a blaze.