Through itself the soul arrives at all harmony that is perceptible in otherness-just as through what is internal the soul arrives at what is external.

In every science certain things must be accepted as first principles if the subject matter is to be understood; and these first postulates rest upon faith.

With the senses man measures perceptible things, with the intellect he measures intelligible things, and he attains unto supra-intelligible things transcendently.

The fact is that man has no longing for any other nature but desires only to be perfect in his own.

For when we say that what is different is different, we affirm that what is different is the same as itself. For what is different can be different only through the Absolute Same, through which all that is is both the same as itself and other than another.

An external thing that is knowable [is knowable] by means of something internal that is consubstantial [with the rational soul].

Time is to eternity as an image is to its exemplar, and those things which are temporal bear a resemblance to those things which are eternal.