I place no hope in my strength, nor in my works: but all my confidence is in God my protector, who never abandons those who have put all their hope and thought in him.

This quote means that instead of relying on themselves, the person is relying on God for help. They recognize that God is their protector and will not leave them because they have placed all their trust in him. This person does not believe that their own strength or deeds will be enough to save them and so they depend solely on the help of God.