Concentration Quotes - page 4
While all these are disturbed and divided by the multifarious objects to which their thoughts must be applied, the Philosopher pursues, in solitary silence and in unbroken concentration of mind, his single and undeviating course towards the Good, the Beautiful, and the True; and that is his daily labour, to which others can only resort at times for rest and refreshment after toil.
Johann Gottlieb Fichte
[T]he great security against a gradual concentration of the several powers in the same department, consists in giving to those who administer each department the necessary constitutional means, and personal motives, to resist encroachments of the others. The provision for defence must in this, as in all other cases, be made commensurate to the danger of attack.
James Madison