“Everyone knows what attention is. Attention is the taking possession of the mind, in clear and vivid form, of one out of what seem several simultaneously possible objects or trains of thought. Focalisations, concentration of consciousness are of its essence. It implies withdrawal from some things in order to deal effectively with others”—William James , The Principles of Psychology, 1890 via:: Knowledge Continuum

Related:

• [[q.The faculty of voluntarily bringing back a wandering attention over and over again is the very root of judgment character and will]]
• [[adhd]] via:: [[William James]]