We Should Chiefly Depend Not Upon That

Fate Then Is That Necessity By Which A Certain Result Will Surely Be Brought To Pass According To The Natural Course Of Events However We May Vary The Particular Circumstances Which Precede The Event.

It Is A Common Observation That A Science First Begins To Be Exact When It Is Quantitatively Treated. What Are Called The Exact Sciences Are No Others Than The Mathematical Ones.

If Man Were Immortal He Could Be Perfectly Sure Of Seeing The Day When Everything In Which He Had Trusted Should Betray His Trust.

It Is... Easy To Be Certain. One Has Only To Be Sufficiently Vague.

A Hypothesis Is Something Which Looks As If It Might Be True And Were True, And Which Is Capable Of Verification Or Refutation By Comparison With Facts.