But what is the use of preaching the Gospel to men whose whole attention is concentrated upon a mad, desperate struggle to keep themselves alive? William Booth
Each of the various specialists remains too closely concentrated upon his single specialism, too little awake to those of the others. Each sees clearly and seizes firmly upon one petal of the six-lobed flower of life and tears it apart from the whole. Patrick Geddes
I've concentrated upon the things I control, and used that control to remove the restrictions and complications from my life. Harry Browne