Famous quotes containing the words vice and/or principal:
“Keep your hands clean and pure from the infamous vice of corruption, a vice so infamous that it degrades even the other vices that may accompany it. Accept no present whatever; let your character in that respect be transparent and without the least speck, for as avarice is the vilest and dirtiest vice in private, corruption is so in public life.”
—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)
“There are three principal means of acquiring knowledge available to us: observation of nature, reflection, and experimentation. Observation collects facts; reflection combines them; experimentation verifies the result of that combination. Our observation of nature must be diligent, our reflection profound, and our experiments exact. We rarely see these three means combined; and for this reason, creative geniuses are not common.”
—Denis Diderot (1713–1784)