“God is the strength in which I trust.”
If it is helpful, read love, joy, peace, beauty, freedom, and so forth, in the place of the word “God”. Regarding the point the lesson is making, the text is exceptionally clear and unambiguous. Paraphrasing and quoting:
Love and peace (joy and light, freedom and beauty, and so forth) are your safety in every circumstance. They speak to you in all situations and in every aspect of all situations, telling you exactly how to call upon their strength and their protection.
The strength of the inner light in you is successful in all things.
“There is a place in you where there is perfect peace. There is a place in you where nothing is impossible. There is a place in you where the strength of God abides.”