Positive thinking can have a positive impact on both physical and mental stamina and abilities.

 Positive thinking can have a positive impact on both physical and mental stamina and abilities. When you focus on the positive, you are more likely to have a more optimistic outlook on life, which can help you to maintain a more positive attitude and to stay motivated.

 This in turn can lead to better performance in activities that require physical or mental effort. Additionally, positive thinking can help to reduce stress and anxiety, which can have a negative impact on physical and mental stamina.

Furthermore, practicing positive thinking can lead to better decision making and problem solving skills. When you focus on the positive, it's easier to find solutions to problems and make positive choices that can lead to better outcomes.

It's worth noting that positive thinking is not a magic potion to increase stamina and abilities, it is a tool that can support and complement other methods like regular exercise, healthy diet, good sleep habits and so on.