There are periods in history when change is necessary, and other periods when it is better to keep everything for the time as it is. The art of life is to be in the rhythm of your age.
Bio: Euclid, sometimes called Euclid of Alexandria to distinguish him from Euclides of Megara, was a Greek mathematician, often referred to as the "father of geometry". He was active in Alexandria during the reign of Ptolemy I.