A.B. Simpson emphasizes the importance of decisively moving forward in our Christian lives despite uncertainties and challenges. He encourages believers to act boldly with the light they have, trusting that as they step into their present duties and obedience, many questions will be resolved. Simpson suggests that the distractions and doubts we face are often traps set by Satan to hinder our progress. By launching out into the deep, we can experience the vastness of God's mercy and fullness, leaving behind the limitations of our fears and hesitations.

Many difficulties and perplexities in connection with our Christian lives might best be settled by a simple and bold decision of our will to go forward with the light we have, leaving the speculations and theories that we cannot decide for further settlement. What we need is to act, and to act with the best light we have. As we step out into the present duty and full obedience, many things will be made plain which it is no use waiting to decide. Launch out into the deep with a bold plunge, and Christ will settle for you all the questions that you are now debating. More probably, He will show you their insignificance and let you see that the only way to settle them is to leap over them. They are Satan's petty snares to waste your time and keep you halting when you should be marching on. The mercy of God is an ocean divine, A boundless and fathomless flood; Launch out in the deep, cut away the shoreline, And be lost in the fullness of God.