The word "breaking defense" can be interpreted as breaking through and defeating defense, and it can also be interpreted as cheating and cheating to break through some obstacles. If we link "returning like an old friend" with "breaking the defense", it means that the intimate relationship between people can break through various obstacles and be re-established. When we communicate with strangers or old friends in daily life, we may feel alienated and estranged for some reasons, but as long as the two sides treat each other honestly and understand each other, it is possible to "break through" and restore the original relationship.
"Like an old friend going back to defense" is a very special emotional state. When we meet someone again, we may feel strange and unfamiliar for various reasons, but as long as we communicate and understand each other, we can break this defense and establish new and closer ties. This kind of feeling is just like the kind and natural feeling when we meet again after a long separation, which makes us feel happy and full. When we open our hearts and become more tolerant and understanding of the people and things around us, we can break through the defense like old friends and ignite the spark of life.