On Divine Providence by Baruch Spinoza

Providence is nothing else than the striving which we find in the whole of Nature and in individual things to maintain and preserve their own existence. For it is manifest that no thing could, through its own nature, seek its own annihilation, but, on the contrary, that every thing has in itself a striving to preserve its condition, and to improve itself. Following these definitions of ours we, therefore, posit a general and a special providence. The general [providence] is that through which all things are produced and sustained in so far as they are parts of the whole of Nature. The special providence is the striving of each thing separately to preserve its existence [each thing, that is to say], considered not as a part of Nature, but as a whole [by itself]. This is explained by the following example: All the limbs of man are provided for, and cared for, in so far as they are parts of man, this is general providence; while special [providence] is the striving of each separate limb (as a whole in itself, and not as a part of man) to preserve and maintain its own well-being.

1. God cannot omit to do what He does; He has, namely, made everything so perfect that it cannot be more perfect.