Reason refers to the ability to think logically and make decisions based on rationality and evidence. It involves the process of analyzing information, weighing options, and coming to a conclusion based on sound judgment.
Will, on the other hand, refers to the power or faculty of choosing or deciding upon a course of action. It is the ability to make choices and act upon them, often driven by desires, motivations, and personal values.
In essence, reason is the cognitive process of making decisions, while will is the volitional aspect of actually carrying out those decisions. Reason helps us determine what is the best course of action, while will gives us the determination and drive to follow through with that decision.