Practice is absolutely necessary. You may sit down and listen to me by the hour every day, but if you do not practice, you will not get one step further. It all depends on practice.
I oppose any belief that contradicts experimental evidence as determined by the methods of science. All beliefs not in such contradiction may be considered as faith. Whether faith in a particular belief is beneficial or not is another matter.
Those who are bent on revolutionizing society may be divided into those who seek something for themselves thereby and those who seek something for their children and grandchildren.
Time is one thing that can never be retrieved. One may lose and regain friends. One may lose and regain money. Opportunity, once spurned, may come again. But the hours that are lost in idleness can never be brought back to be used in gainful pursuits