Some commentaries (and a link provided below for more), and the Greek meaning of the word, "keep", in Revelation 3:10!

Because you have kept the word of My perseverance, I also will keep you from the hour of testing, that hour which is about to come upon the whole world, to test those who dwell on the earth.

Commentary link
http://www.studylight.org/commentary/revelation/3-10.html

KJV and Strong's
http://www.godrules.net/library/kjvstrongs/kjvstrongsrev3.htm

God bless,
Cindy