We are frequently admonished to "search" the Scripture to seek out the truth that God reveals by His Spirit. We are urged to know what we believe and why. God wants us to have faith and conviction to the point of even giving up our lives in obedience to Him and His truth.
We must carefully examine God's Word and learn what is true. And having found it, we should adhere to it always, not yielding an inch of ground when supposedly new teaching comes around from the mouth of smooth talkers. Not all church members have stood firm, as we know from experience. Some, making poor choices about what "truth" they will adhere to, have been blown off course, sailing away from their original destination—the Kingdom of God. They will, of course, end up in a different port.
This may be what Paul is referring to in Ephesians 4:14—that some members of the church in Ephesus were not following Christ's path. They had become liberal and lax, no longer having the conviction to the truth fixed in their hearts and minds. The doctrines and truth they once held were no longer resolute in their minds. Their faith was weakening, and in consequence, they began to yield to every new opinion and submit to the guidance of every new teacher.
So, as it is brought out in Ecclesiastes 1:9, "There is nothing new under the sun." What has happened in the past happens in the present.
We must really know the truth of God, believe it, and be fully convinced of it in true faith. In addition, we have to have our glorious destination as our goal and steer a steady course toward it.
When faced with the prevailing wind, a sailor can "beat to windward," a technique that involves a maneuver called "tacking." Tacking, also called "coming about," is turning the boat at an angle to run against the wind so that one travels sideways in order to make forward progress. It takes some work and skill, but one can actually proceed on course to his destination.
It is a matter of control. Instead of being blown freely in the direction of the prevailing wind, one can gain control of his direction. Once again, it is the set of our sails, not the prevailing wind that determines our course. We have a Captain who knows the seas and the winds and how to get us to His port.