Importantest

[…] Mathematicians uſe but one ſingle proofe in all their Propoſitions, after which other ſupernumerary ones, would be but tedious nevertheles, ſince al the ſeveral wayes, by which we may look into the nature of our ſoule (the importanteſt ſubject we can buſy our thoughts upon) can not faile of being pleaſing and delightfull to us, we muſt not omit to reflect a little upon that great property of our ſoule, by which ſhe is able to move and to worke, without her ſelfe being moved or touched.