You can train yourself to think fast. Your body (nervous system) needs to adapt to that speed. You may get headaches in the process. It's important to know your limits (self-knowledge/knowing the limits). It requires practice and patience. If it is done right, it's a nice self-empowerment experience.
In order to ascend to enlightenment/highest consciousness is necessary an increase in frequency of thought, it needs to reach the highest frequency possible (but it also needs high quality of thinking (sanity, clarity, fluidity,...)). High frequency, in terms of consciousness, means less time to solve problems, ergo an increase in intelligence.
