If you cultivate thoughts of fear, fear will rule your life. If you cultivate your highest thoughts, you will achieve MASTERY in life.
Cultivate mean to promote the growth of, to nurture; foster.
When you pay any attention at all to thoughts of doubt and fear, you are cultivating them. When thoughts of fear and doubt enter your mind, use that as an ALERT Signal to think your highest thoughts and promote the growth of those thoughts instead.
You will know when your highest thoughts are taking root in your heart and soul. You will begin feelings those thoughts on the inside of you. When you feel those thoughts, that is when those thoughts become real to you and that's when they have the POWER to become the Reality of your life.