I Know That I Exist; The Question

Intuitive Knowledge Is An Illumination Of The Soul, Whereby It Beholds In The Light Of God Those Things Which It Pleases Him To Reveal To Us By A Direct Impression Of Divine Clearness.

These Long Chains Of Perfectly Simple And Easy Reasonings By Means Of Which Geometers Are Accustomed To Carry Out Their Most Difficult Demonstrations Had Led Me To Fancy That Everything That Can Fall Under Human Knowledge Forms A Similar Sequence; And That So Long As We Avoid Accepting As True What Is Not So, And Always Preserve The Right Order Of Deduction Of One Thing From Another, There Can Be Nothing Too Remote To Be Reached In The End, Or To Well Hidden To Be Discovered.

The Senses Deceive From Time To Time, And It Is Prudent Never To Trust Wholly Those Who Have Deceived Us Even Once.

The Only Thing That I Know, Is That I Know Nothing

Science Is Practical Philosophy.