Sell oneself short
You're selling yourself short.
The meaning is to underestimate the true value or worth of. It is always difficult to estimate ourselves value, isn't it?
Refs
- http://www.thefreedictionary.com/sell+short
- http://www.eslpod.com/website/show_podcast.php?issue_id=14566697
[pv]
14-01-08 17:52, 14-01-08 17:52, Yosei