We must guide our thoughts to achieve the best outcome
The Bible says: "casting down arguments and every high thing that exalts itself against the knowledge of God, bringing every thought into captivity to the obedience of Christ,"2 Corinthians 10:5
The word "captivity" in the Greek text is used for "going to the enemies camp, sizing them and bringing them captive". In every thought that comes to my mind I have the power and duty to analyze if they are convenient or not, if this thought is good or is just waste of time, or worse, can drive me down to harmful things. I must capture them and bring under obedience to the good things God wants in my life.
Many people think they are guided or misguided by their emotions. We heard about "crime of passion", the ones committed under an uncontrollable emotion. We understand that emotions are powerful, but emotions are caused by thoughts, when we let one thought come in and we nurture that thought it will cause emotions and then by continuing that thought we empower the emotion till the point that the emotion grows disproportionately and begin to "control" us.
The first thing we need to do is not to invite or not to let uninvited thoughts dwell in our minds. We control our thoughts and we direct them to where we want to go.
Evaristo Lacerda Living by Design LoA page 23