HOW we are to reckon ourselves

Romans 6:11-15;

11 Likewise reckon ye also yourselves to be dead indeed unto sin, but alive unto God through Jesus Christ our Lord.

12 Let not sin therefore reign in your mortal body, that ye should obey it in the lusts thereof.

13 Neither yield ye your members as instruments of unrighteousness unto sin: but yield yourselves unto God, as those that are alive from the dead, and your members as instruments of righteousness unto God.

14 For sin shall not have dominion over you: for ye are not under the law, but under grace.

15 What then? shall we sin, because we are not under the law, but under grace? God forbid.

FIRST:/   Nowhere in the KJV of God's Word does it ever tell, instruct, teach us to "reckon ye yourselves to be sinners" (you can search and search and search ye again and again and nowhere; you will never find it written). However, you will find  Rom. 6:11-15; 
and, the Bible does not contradict itself (only ignorant mankind, who do not know nor understand God's Word, finds contradiction in God's Word).