The happiness that you get from leading an honest life is something you can never get by leading a dishonest life. You may have all the gadgets and luxuries at your disposal, but what is the use if you are not able to sleep in peace.
Now you choose what you want. Do you want to live peacefully, sleep peacefully, and walk with your head held high? Can you boldly say that you have led an honest life? To be able to say this can bring you happiness and satisfaction that nothing else can.