according to own lights
according to (one's) own lights
Based on one's beliefs or inclinations. You may not agree with Kara's free-spirited lifestyle, but she has always lived according to her own lights.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
according to one's own lights
according to the way one believes; according to the way one's conscience or inclinations lead one. John may have been wrong, but he did what he did according to his own lights.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.