FILE – This June, 1954, file photo shows renowned physicist Albert Einstein in Princeton, N.J. Einstein was a father who worried his son wasn’t taking his geometry studies seriously enough, and that he was indebted to a favorite uncle for giving him a toy steam engine when he was a boy, launching a lifelong interest in science. He also believed the infidelity of a friend’s spouse was no big deal. These and other reflections, including personal opinions on God and politics, are contained in 27 letters being offered by a private collector at auction this week. (AP Photo, File)