Deterrence is to create fear in the heart of an imaginary enemy and prevent him from doing things against him  But there are two sources of this fear: first, if the opponent wants to recognize the strength of the deterrent, it is difficult to imagine that a weak country can deter the powerful United States; second, the opponent should also believe in the determination of the deterrent to use its strength to achieve its goal, in other words, the opponent should confirm the intention of the deterrent
There is no point in simply showing strength or verbal threats if the opponent believes that the deterrent does not have a real offensive intention
The deterrent achieves the purpose of deterrence by making potential opponents believe in their own strength.