The same impression that the presence of one formidable object works upon the kernel and which causes fear in some men may in others rouse up courage and boldness. The reason whereof is that all brains are not alike disposed, for the same motion of the kernel, which in some excites fear, in others causes the spirits to enter into the pores of the brain, which convey them, part into the nerves which serve to use the hands for defense, and partly into those which agitate, and drive the blood towards the heart, in that manner as is required to produce spirits proper to continue this defense, and retain a will to it.