I am certainly not against, in this regard, giving teachers direct instruction on deep principles of mathematics. (ncee.org)
We should aim more at healthy, happy, tolerant and other deeper principles before we aim at broad - stroke titles. (nakedpastor.com)
I see analogies as tools to see below the particulars to which we are attached and allows us to feel and understand deep principles that unite us more truly then our petty cognitions. (nakedpastor.com)