When you react, you don't give your mind the time to get filled with emotions. You are devoid of anger, fear, and frustration; you are simply moving.
Jiu Jitsu at the end of the day, is the art of expressing yourself honestly. Everytime you put on a Gi, you can't lie.
If you think, you are late. If you are late, you use strength. If you use strength you get tired. And if you get tired, you die!