The science of numbers ought to be preferred as an acquisition before all others, because of its necessity and because of the great secrets and other mysteries which there are in the properties of numbers. All sciences partake of it, and it has need of none.

As far as possible, join faith to reason.

Love has three kinds of origin, namely: suffering, friendship and love. A human love has a corporal and intellectual origin.

Wretched men cringe before tyrants who have no power, the victims of their trivial hopes and fears. They do not realise that anger is hopeless, fear is pointless and desire all a delusion. He whose heart is fickle is not his own master, has thrown away his shield, deserted his post, and he forges the links of the chain that holds him.

A man content to go to heaven alone will never go to heaven.

I who once wrote songs with keen delight am now by sorrow driven to take up melancholy measures. Wounded Muses tell me what I must write, and elegiac verses bathe my face with real tears. Not even terror could drive from me these faithful companions of my long journey. Poetry, which was once the glory of my happy and flourishing youth, is still my comfort in this misery of my old age.

Nunc fluens facit tempus,nunc stans facit aeternitatum.(The now that passes produces time, the now that remains produces eternity.)