Answer:
While courage is certainly an important trait, I wouldn't say that it is everything. Strength and age can also be important factors in certain situations, and it's not always possible or practical to rely solely on courage.
For example, if someone is facing a physical threat, having strength and physical fitness can be critical to their ability to defend themselves. Similarly, age and experience can bring valuable knowledge and wisdom that can be useful in a variety of situations.
That being said, courage is certainly an admirable trait, and it can be incredibly valuable in situations where fear or uncertainty might otherwise hold someone back. It takes courage to stand up for what you believe in, to face your fears, and to take risks in pursuit of your goals.
So, while I wouldn't say that courage is everything, I do believe that it is an important quality to cultivate and develop, as it can help us to overcome obstacles and achieve great things in our lives.