Let every Man make a truer Measure of himself, what he is able to do, and what not, before he comes to any peremtory Resolution how to proceed. He is a Madman, that to avoid a present and less Evil, runs blindfold into a greater; and for the gratifying of a froward Humour, makes himself a Slave all the Days of his Life.
Source: L'Estrange 56.
Click here for a SLIDESHOW of all the Harrison Weir images. As you can see, the horse's opponent in this illustration is a stag, not a boar - you can find the fable told both ways.