E. Seguin.
"Without an accurate acquaintance with the visible and tangible properties of things, our conceptions must be erroneous, our inferences fallacious, and our operations unsuccessful."
Herbert Spencer.
"The truths of number, of form, of relationship in position, were all originally drawn from objects; and to present these truths to the child in the concrete is to let him learn them as the race learned them."
Herbert Spencer.
"If we consider it, we shall find that exhaustive observation is an element of all great success."
Herbert Spencer.
"Learn to comprehend each thing in its entire history. This is the maxim of science guided by the reason."
Wm. T. Harris.
"Geometrical facts and conceptions are easier to a child than those of arithmetic."