Constant means remaining the same over an extended period of time.
Children need parents who provide an example and instruction for how to live that is constant.
Employees need direction that is constant for future growth and development.
The implication for spiritual leadership is the same. Why? Because God is constant. His word does not change. He does not change.
Since God is such a constant for life, our efforts must be to develop the qualities needed to demonstrate a constant for others.
If there was ever a need within the church for the world to see, it would be something constant.