(Right and Wrong have been made distinct as day and night.) We have appointed the Night and the Day as two of Our Signs. The Sign of the Night We have made darkness (of ignorance) while the Sign of the Day we have made brightness (of Guidance). You shall seek the Bounty from your Lord, and be aware of the passing years and make your calendars. (6:97), (10:5). (Reckon every day, month and year to see what you have gained and what you have lost in your self-development). We have given you much detail in this brief statement.