Dictionary of Biblical Words:
Great stress is laid in Scripture on the direction of the eye. A single eye means an eye wholly directed to and occupied with one object: in Scripture this object is Christ. We get the doctrine in Matt. 6, the practice in Phil. 3 in Paul.
Strong’s Dictionary of Greek Words:
Transliteration:
kerdaino
Meaning:
from 2771; to gain (literally or figuratively)
KJV Usage:
(get) gain, win