Original sentence: All activity only appears to occur in the external world.Externally, we directly know God's operations.For Malebranche, we directly know internally the ideas in our mind.He declared instead that the real external world is actually God.In actuality, it is the activity of God.Malebranche a student of the Cartesian School of Rationalism disagreed that if the only things that we know for certain are the ideas within our mind, then the existence of the external world would be dubious and known only indirectly.This kind of idealism led to the pantheism of Spinoza