True love - that is, deep, abiding love that is impervious to emotional whims or fancy - is a choice. It's a constant commitment to a person regardless of the present circumstances.

Fear comes from uncertainty. When we are absolutely certain, whether of our worth or worthlessness, we are almost impervious to fear.

Discipline strengthens the mind so that it becomes impervious to the corroding influence of fear.

The problem with thick skin is that it leaves you impervious to the sharpest of pins. Everything becomes dull. But without that sense of pain, there cannot be that sense of relief. Ultimately, the thickened skin leaves you numb, incapable of feeling the highs and lows of life. It leaves you rough like a rock and just as inanimate.

Always learn poems by heart. They have to become the marrow in your bones. Like fluoride in the water, they'll make your soul impervious to the world's soft decay.

"A philosophical thought is not supposed to be impervious to all criticism; this is the error Whitehead describes of turning philosophy into geometry, and it is useful primarily as a way of gaining short-term triumphs in personal arguments that no one else cares (or even knows) about anyway. A good philosophical thought will always be subject to criticisms (as Heidegger's or Whitehead's best insights all are) but they are of such elegance and depth that they change the terms of debate, and function as a sort of "obligatory passage point" (Latour's term) in the discussions that follow.

Discipline strengthens the mind so that it becomes impervious to the corroding influence of fear.

Fear comes from uncertainty. When we are absolutely certain whether of our worth or worthlessness we are almost impervious to fear.

It is of course further indication that a fundamentalist right has really taken over much of the Republican Party People might cite George Bush as proof that you can be totally impervious to the effects of Harvard and Yale education.