"Madness Is To Think Of Too Many Things In Succession": This part suggests that constantly shifting your focus from one thought to another in rapid succession can be overwhelming and counterproductive. It alludes to the chaos of a scattered mind.
"Too Fast or Of One Thing Too Exclusively": This segment highlights the importance of balance in thinking. On one hand, racing through thoughts without depth can lead to confusion. On the other hand, fixating on a single idea to the exclusion of all else can lead to tunnel vision.
In essence, the quote cautions against extremes in thinking patterns. It advises finding a middle ground where thoughts are organized, diverse yet focused. Maintaining mental balance is essential for productivity and avoiding the "madness" of scattered or obsessive thinking.