This quote talks about the idea that someone's grace, which means their kindness and forgiveness, is like a protective blanket around us. It means that we feel safe and secure because of this person's grace. Imagine it like a warm and cozy blanket that shields us from the cold.
When it says, "This is all I know," it means that the speaker doesn't need to know anything else because they are content and happy with the protection and love they get from this person. It's like saying, "I don't need anything more than this."
And when it says, "All I need," it emphasizes that the person's grace is everything the speaker requires to be happy and fulfilled. It's like saying, "I only need this person's kindness, and I'll be okay." So, in simple terms, this quote expresses gratitude and contentment for the love and protection someone receives from another person's grace.