And by this we may be sure that we know him, if we keep his commandments.
He who says "I know him" but disobeys his commandments is a liar, and the truth is not in him;
but whoever keeps his word, in him truly love for God is perfected. By this we may be sure that we are in him:
he who says he abides in him ought to walk in the same way in which he walked.
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved. (Revised Standard Version - Holy Bible)