It is to be observed touching the spirits […] That when men perceive their spirits to be in good, placid, and healthful state, (that which will be seen by the tranquility of their Mind, and chearful disposition) that they cherish them, and not change them: but when, in a turbulent and untoward state, (which will also appear by their sadness, lumpishness, and other indisposition of their mind) that then they straight overwhelm them, and alter them.