"To some degree. I know I couldn't do it anymore"

Chuck Daly's quote recommends that he knows his own limitations and that he is no longer able to do something that he was once able to do. This could be interpreted in a range of methods, depending upon the context of the quote. It could suggest that he is no longer able to do something physically, such as playing a sport or running a marathon. It could also mean that he is no longer able to do something mentally, such as resolving complex issues or comprehending complicated principles. It could likewise mean that he is no longer able to do something emotionally, such as dealing with difficult individuals or situations. Whatever the case may be, it is clear that Chuck Daly knows his own limitations and is no longer able to do something that he was as soon as able to do.