She believed that she was an 'instrument' of God. [=she believed that God was using her to do things; she believed that God was acting through her]
Part of her training as a pilot involved learning to fly by 'instruments'. [=learning to fly only by looking at the instruments in the airplane]
Movies can be useful 'instruments' of social change. [=movies can be used to cause social change]
(..) Yes, it's advisable. Because they'll be bleeding? The procedure is called dilation and curettage. The cervix is dilated and an instrument called a curette is inserted to remove the... tissue. Will it hurt? No, you'll be etherized. Cover yourself with this. (..)2014 TvShow: The Knick Title: The Golden Lotus Season: 1 Episode 9