Start with God - the first step in learning is bowing down to God; only fools thumb their noses at such wisdom and learning.
— King Solomon

The fingers must be educated, the thumb is born knowing.
Marc Chagall thumb quote

It suddenly struck me that that tiny pea, pretty and blue, was the Earth. I put up my thumb and shut one eye, and my thumb blotted out the planet Earth. I didn't feel like a giant. I felt very, very small.
— Neil Armstrong

And of course we are familiar with the English common law rule of thumb that said a man could in fact use a stick no bigger than his thumb to discipline his wife and family.
— Patricia Ireland

“ ‘As things stand now, I am going to be a writer. I’m not sure that I’m going to be a good one or even a self-supporting one, but until the dark thumb of fate presses me to the dust and says ‘you are nothing,’ I will be a writer.’”
— thumb quotation by Hunter S. Thompson