keen

a.敏銳的、敏捷的
very good or well developed

Because he took his keen insights into the people around him and crafted them into his work, all he needed was for me and everyone else to go on being ourselves.

a.熱心的、熱衷的、深切的
very interested, eager, or wanting (to do) something very much

They were very keen to start work as soon as possible.