Sentence:  You may be very religious , a good church member , an upright , honest and sincere person ; you may be baptized , confirmed , reverent and worshipful ; you may attend mass , do penance , say prayers and zealously <WSD>keep</WSD> all the sacraments and ceremonies of the church ; you may have the final and extreme unction but if you are not born again you are lost and headed for hell and eternal punishment . 
Meaning of the word marked with <WSD> tags:  keep in a certain state, position, or activity; e.g., "keep clean"