hide one's light under a bushel

[hide one's light under a bushel] {v. phr.} To be very shy andmodest and not show your abilities or talents; be too modest inletting others see what you can do.

When Joan is with her closefriends she has a wonderful sense of humor, but usually she hides herlight under a bushel.

Mr. Smith is an expert in many fields, butmost people think he is not very smart because he hides his lightunder a bushel.

All year long Tommy hid his light under a busheland the teacher was surprised to see how much he knew when she readhis exam paper.