Does Scripture say that one loves Christ by keeping "faith ALONE?"

Or does Scripture say?
John 14:23

King James Version (KJV)
23Jesus answered and said unto him, If a man love me, he will keep my words: and my Father will love him, and we will come unto him, and make our abode with him.

John 14:21

King James Version (KJV)
21He that hath my commandments, and keepeth them, he it is that loveth me: and he that loveth me shall be loved of my Father, and I will love him, and will manifest myself to him.

Which do you believe?

Sincerely,

De Maria