Now I know in part, but then shall I know even as also I am known. The words are second grade words, but the ideas have been debated for centuries. All of it great writing. Writing the youngest child and oldest adult can read, each at their own levels of understanding. It is the thought behind the words that makes fine writing, not the words themselves.
Words are carriers of the message.
Nothing more, nothing less. They are like busy ants carrying loads much heavier than their own weight. Search carefully for the right word. The most valuable of all my books is a 1931 edition of Roget's Thesaurus, given me by my aunt Lavinia when I went off to college. It had been given to her in 1945.