This quote suggests that it takes more than just strength and courage (symbolized by a “heart of oak”, as oak is a strong and sturdy wood) to eliminate all fears except the fear of God. It implies that one needs not only physical or emotional strength, but also spiritual and moral strength. The fear of God here represents a deep respect and reverence for the moral and spiritual laws of the universe, rather than fear in the traditional sense.

In essence, it means that one must cultivate inner strength and moral fortitude to rise above mundane fears and anxieties and focus on the bigger picture, which is to live a righteous and virtuous life. It is only when one has this profound respect and understanding of these universal laws that one can truly shed all other fears.

In today’s world, this idea could be applied in various ways. For instance, in the face of global issues like climate change, terrorism, and social injustice, it’s easy to be overwhelmed by fear and anxiety. However, if we cultivate a “fear of God” – that is, a deep respect for the laws of nature, justice, and morality – we can overcome these fears and work towards solutions with courage and conviction.

In terms of personal development, this quote suggests that we should strive to develop not just physical and emotional strength, but also moral and spiritual strength. We should aim to live our lives in accordance with our highest values and principles, and not let our actions be driven by fear or anxiety. Only then can we truly be free of fear and live a fulfilled and meaningful life.