Men hear that phrase and the ego immediately goes to work. It turns it into a self-improvement project. It thinks "wise as serpents" means to be clever, shrewd, a master of worldly strategy. It thinks "innocent as doves" means to be nice, morally pure, and harmless.

So the religious ego tries to become a "clever, nice person." This is a spiritual disaster. It is a man trying to be a clever fox and a gentle sheep at the same time. He is a walking contradiction, a bundle of anxiety.
That is not what the phrase means. It is not a command to balance two opposing character traits. It is a description of a single, unified, and paradoxical state of consciousness. It is the description of a man whose ego is dead.
Wise as a Serpent
What is the true nature of the serpent, stripped of the ego's mythology?
It is Silent: A serpent moves in silence. It does not announce its presence. Its power is in its stillness. To be wise as a serpent is to have a silent mind. It is to move through the world from a place of inner stillness, not from the constant noise of the chattering intellect.
It is Grounded: A serpent is always in direct contact with the earth. It is a creature of pure reality. It feels the vibrations of what is, not what it thinks should be. To be wise as a serpent is to be ruthlessly grounded in the present moment, in the raw, unfiltered reality of what is happening, not in the ego's story about it.
It Sheds its Skin: This is the most profound wisdom. A serpent cannot grow unless it periodically sheds its old, dead skin. It must die to its old self to continue living. To be wise as a serpent is to live in a state of perpetual ego-death, constantly shedding the old skin of your past, your opinions, your grievances, your very identity.
It is Non-Reactive: A serpent at rest is a model of conserved energy. It does not react to every leaf that falls. It acts only when necessary, with a sudden, total, and undivided focus. To be wise as a serpent is to be free from the slavery of reaction. You are no longer a puppet pulled by the strings of external events. You act from stillness, not from impulse.
Innocent as a Dove
What is the true nature of the dove? It is the symbol of the Holy Spirit. Its "innocence" is not naivete. The word "innocent" means to be "un-mixed," "un-adulterated." It means to be harmless because the mechanism of harm has been removed.
To be innocent as a dove is to have a consciousness that is completely pure in its motive.
It is to have no self-interest.
It is to have no hidden agenda.
It is to have no desire to win, to be right, or to gain an advantage.
It is the state of a soul that has been so completely emptied of "self" that it has become a pure vessel for the Spirit. An empty vessel cannot harm anyone, because there is no "one" there to do the harming.
The Unified State
"Wise as a serpent and innocent as a dove" (Matthew 10:16 ) is a description of the Christ-consciousness. It is a single state of being:
It is to have the serpent's perfect, silent, and ruthless perception of Reality, combined with the dove's complete and total absence of a self that would use that perception for its own gain.
What this looks like:
You are in a business meeting. The serpent's wisdom in you sees everything. It sees the hidden agendas, the fear behind the bravado, the subtle manipulations, the lies. It sees the entire ego-game with crystal clarity.
But the dove's innocence in you means you have no reaction. You are not angered by the lies. You are not tempted to play the game better than them. You have no desire to win or to expose them for your own advantage.
You sit in perfect, silent peace. And from that silence, the one true and perfect action arises. It may be a single, simple question that cuts through all the illusion. It may be to say nothing at all.
You have the wisdom to see the trap, and the innocence to have no part of you that could ever be caught in it. That is the state of the man who has died and been born again.