God never tells us what others see. He never calls us what others
call us. Gideon thought he was a coward. God knew him to be a great
warrior and pronounced what He saw. "You might man of war".. Judges 6:12

God also saw in Peter what others failed to see. His given name was
Simon, which means meek. (Literally it means “unstable, flaky, leaf.”)
When Jesus met Simon, he was the flakiest, leafiest man you ever met.
He was always going with the wind—changing his mind. But God saw
a stone in the leaf. The first time Jesus met Peter, He changed Peter’s
name from Simon (leaf) to Peter (stone). Although Simon was an
unstable guy, Jesus said, “I’m going to change your name. Your name
is Peter.” Peter acted like a leaf throughout Jesus’ earthly ministry. Still
Jesus called him rock every morning. Jesus saw in Peter something his
mother had not seen. He kept chipping until finally, at Pentecost,
Peter’s true nature was revealed.