If God did not exist, it would be necessary to invent him; let us worship God through Jesus if we must - if ignorance has so far prevailed that this name can still be spoken in all seriousness without being taken as a synonym for rapine and carnage. Every sensible man, every honourable man, must hold the Christian sect in horror.
The system of Descartes... seemed to give a plausible reason for all those phenomena; and this reason seemed more just, as it is simple and intelligible to all capacities. But in philosophy, a student ought to doubt of the things he fancies he understands too easily, as much as of those he does not understand.
The instruction we find in books is like fire. We fetch it from our neighbours, kindle it at home, communicate it to others, and it becomes the property of all.
Let us meet four times a year in a grand temple with music, and thank God for all his gifts. There is one sun. There is one God. Let us have one religion. Then all mankind will be brethren.