And There Must Be Simple Substances, Because

Now, As There Is An Infinity Of Possible Universes In The Ideas Of God, And As Only One Of Them Can Exist, There Must Be A Sufficient Reason For God's Choice, Which Determines Him Toward One Rather Than Another. And This Reason Can Be Found Only In The Fitness, Or The Degrees Of Perfection, That These Worlds Contain, Since Each Possible Thing Has The Right To Claim Existence In Proportion To The Perfection It Involves.

I Also Take It As Granted That Every Created Thing, And Consequently The Created Monad Also, Is Subject To Change, And Indeed That This Change Is Continual In Each One.

Of What Use Would It Be To You, Sir, To Become King Of China On Condition That You Forgot What You Have Been? Would It Not Be The Same As If God, At The Same Time He Destroyed You, Created A King In China?

Indeed Every Monad Must Be Different From Every Other. For There Are Never In Nature Two Beings, Which Are Precisely Alike, And In Which It Is Not Possible To Find Some Difference Which Is Internal, Or Based On Some Intrinsic Quality.

To Love Is To Take Delight In Happiness Of Another, Or, What Amounts To The Same Thing, It Is To Account Another's Happiness As One's Own.