This quote by H. G. Wells offers profound insight into the nature of optimism in the face of uncertainty and adversity. It suggests that when confronting the hardships of the world, it is both rational and ethical to adopt an attitude of confident hopefulness. Instead of succumbing to despair or apathy given the unpredictable nature of global troubles, Wells encourages adopting the stance of a 'reasonable man' who behaves as if overcoming those difficulties is not only possible but certain.

What resonates here is the power of action grounded in belief. Our mental and emotional state influences our experience and response to circumstances. By choosing to be cheerful and optimistic, even without guarantees, we better equip ourselves to face challenges positively and resiliently. This choice has intrinsic value – even if the desired outcome does not manifest, the act of maintaining cheerfulness enriches our subjective experience, fostering courage and sustaining our will.

The quote also subtly critiques fatalism or passive pessimism. It hints that while skepticism is natural and caution warranted, allowing doubt to paralyze or diminish one's spirit does not serve us. Instead, hope is portrayed not as naivety but as a deliberate and rational posture.

In summary, Wells’ words inspire us to embrace hope and joy as purposeful acts of reason and character. We may not control external events, but in deciding how to approach them, we find agency and grace. Whether or not optimism proves justified, living with cheerfulness offers a life-affirming avenue through life’s inevitable trials.