Golden section

The most satisfactory division of line is one that creates those two fundamental attributes of all fine design or painting , unity and variety. Division of line according to the golden mean as in diagram below produces this desired result as follows . Variety is created by the contrast of size between CB and AC .
Unity is created by relating these contrasting segments to each other and to the original line AB by a continued proportion or repetition of the golden mean Ratio as follows
Any line may be easily and quickly divided as below . And the best possible division of rectangle in two parts according to the golden means to keeps variety and unity , those two essential requisites of all fine painting .The most satisfactory division of line is one that creates those two fundamental attributes of all fine design or painting , unity and variety. Division of line according to the golden mean as in diagram below produces this desired result as follows . Variety is created by the contrast of size between CB and AC .
Unity is created by relating these contrasting segments to each other and to the original line AB by a continued proportion or repetition of the golden mean Ratio as follows
Any line may be easily and quickly divided as below . And the best possible division of rectangle in two parts according to the golden means to keeps variety and unity , those two essential requisites of all fine painting .