The quote by Elbert Hubbard, "It does not take strength to do things, but it requires great strength to decide on what to do," beautifully encapsulates the complex nature of decision-making and how it can often be more challenging than the execution of a task.

On the surface, the act of "doing" things can seem straightforward, particularly if the task at hand is simple or familiar. There's a level of routine or mechanistic process in carrying out actions that we're already accustomed to. This can be true whether we're talking about physical tasks, like lifting a weight or running a mile, or mental tasks, like solving a puzzle or writing an essay.

However, the process of deciding what to do can be more demanding. This requires a higher level of cognitive function, like strategic thinking, judgment, and the ability to forecast possible outcomes. It also involves confronting uncertainty and taking risks. For instance, a business leader deciding whether to expand into a new market must weigh many complex factors and navigate uncertainty. They must consider the potential rewards and risks, the reactions of competitors, the potential impact on their existing business, and much more.

Deciding often involves moral and ethical considerations, adding another layer of complexity. Making the "right" decision often requires strength of character, as it might mean choosing a more challenging path or one that might not bring immediate rewards. It could also mean standing against popular opinion or facing criticism.

Furthermore, deciding also requires self-knowledge and introspection. We must understand our priorities, values, and goals to make decisions that align with who we are and who we want to be. This self-understanding and self-discipline can be one of the most challenging aspects of decision-making.

In conclusion, while the process of doing can require physical or mental strength, the act of deciding what to do often demands even greater strength — cognitive, emotional, moral, and sometimes even physical. This strength reflects our capacity to navigate uncertainty, evaluate complex scenarios, stand firm in our values, and take purposeful action toward our goals.