You are the creator of your so called 3D reality and it starts with a thought. So friends thoughts are important.
Can you activate your thoughts ? Anyway why should you activate it ? The answer to the first question is – yes, you can activate it, and the answer to the second question is – to empower it !
So then how do you activate your thoughts ? You know hundreds of thoughts are flitting across your mind but when you wish to consciously create something, you happily choose to focus on the one thought. You imagine it, visualize it, you affirm it, you write it till you get the feel of or the joyous emotion of already having it. You hold on to this feeling while slowly inhaling and exhaling through your heart for as long as you can do so.
So, in short, to activate a thought you need to empower it by your continued joyous focus on the desired FEELING in your heart. Heart has magnetic charge. Like a magnet it pulls your desire, your dream from the Quantum Field for you. Miracle happens !
Can you de-activate a negative thought ? Yes, you can by not focusing on it, by not researching why or wherefrom this terrible thought came. By removing your attention from it, you starve it of energy and thus it loses its charge.
Well there is another way of dealing with negative thoughts. Yes, you have guessed it. You can change the way YOU see it ! Everything has two sides to it, just flip it !
And, of course, you can always transform anything to its highest state of existence by embracing it with the Divine life force of love.