I John 2: 5-6
But whoso keepeth his word, in him verily is the love of God perfected: hereby know we that we are in him. He that saith he abideth in him ought himself also so to walk, even as he walked.
keepeth (tereo – pronounced tay-reh-o)
a watch; to guard (from loss or injury) properly by keeping the eye upon
perfected (teleioo – pronounced tel-i-o-o)
to complete; literally, to accomplish; figuratively, consummate in character
hereby and in mean the same thing and are the same Greek word “en”
a primary preposition denoting a fixed position in place, time, or state
abideth (meno – pronounced men-o)
a primary verb; to stay in a given place, state, expectancy, or relation; continue, dwell, remain
walk and walked (peripateo – pronounced per-ee-pat-eh-o)
to tread all around; walk as proof of ability; figuratively, to live or follow
obey (peitho – pronounced pi-tho)
to be persuaded, to listen to; to convince by argument, true or false; to rely by inward certainty; agree,
assure, have confidence, be content, trust, yield
The obedience suggested is not by submission to authority, but resulting from persuasion.
peitho means to persuade and pisteuo means to trust
The difference in meaning is that the former implies the obedience that is produced by the latter.
Faith is of the heart and is invisible to men, but obedience is an outward thing that can be seen.
When a man obeys God he gives the only possible evidence that he really believes Him. A person believes because they are persuaded that a thing is true.
Obedience is an actual and outward result of the inward persuasion and consequent faith.
So if we say we abide in God, we will show Him by being obedient to do what He says.