The author, Z.T. Fomum, boldly argues that anything a man can do for God is of no consequence if it is not done as an overflow of his knowledge of God.
An initial encounter is important, but beyond that, it takes
spiritual knowledge,
a high frequency,
intensity, and
a long duration
of encounters between a man and his God.
This book is a pertinent plea that no one should serve God without knowing Him.
It's highly recommended.