There is a distinct possibility that you may face a situation, or situations, where you find yourself imagining that you want to die. It may help to remember that you are now in communication with the same part of your mind that watches cartoons, the part that suspends accurate judgement in favour of an imagination.
"Milk" is proceeding with that fog, "meat" is taking a step back and seeing your imagination’s babblings for what they are.
Not for a moment is it suggested that you cancel your emotions. Your ability to emote is an important part of you and should not be discarded. God values your emotions, which is why He rewards them.
But not all emotions are to be accorded equal status; indeed, ALL of them should be examined. The true ability to examine them is what maturity is all about.