The telephone conversation is, by its very nature, reactive, not reflective. Immediacy is its prime virtue. The immediacy delivers quick company, instant stimulation; the stimulation is cathartic; catharsis pushes back anxiety; into open space flows the kind of thought generated by electric return.
The letter, written in absorbed solitude, is an act of faith; it assumes the presence of humanity; world and self are generated from within; loneliness is courted, not feared. To write a letter is to be alone with my thoughts in the conjured presence of another person. I keep myself imaginative company. I occupy the empty room. I alone infuse the silence.