In the sixth chapter of Scripture, we read of the first vessel intended to travel upon the seas. Secular history attests to seafaring vessels being around at least 6,000 years, with perhaps the Egyptians pioneering the way around the time of Abraham. It is thought that as early as the second millennium a crude means of measuring the depths of the water had been developed. Certainly, the use of a lead weight and line measurements were in practice by the time we read about Paul’s shipwreck and the events leading up to it (Acts 27:28). One such event prior to the shipwreck involved sailors who “took soundings and found” the sea’s depth “to be twenty fathoms; and a little farther on they took another sounding and found it to be fifteen fathoms.” This was to prevent running aground “somewhere on the rocks” (Acts 27:29), so they put down anchors.
With regard to our personal lives, we need to regularly “take soundings.” Paul says it this way: “Test yourselves to see if you are in the faith; examine yourselves! Or do you not recognize this about yourselves, that Jesus Christ is in you–unless indeed you fail the test?” (2 Cor. 13:5). While it is far easier to analyze how others are living, how committed or uncommitted they are, Paul does not suggest this. It is far too easy for us to drift from where we ought to be (cf. Heb. 2:1). We may have been close to Christ last year or last month, but what about now? What about doctrinally? Are we balanced or have we moved toward extremes whether loosing where God has bound or binding where God has not? What about in our family life versus time spent with the job or personal pursuits? How is our marriage?
See, self-examination is so crucial yet for most of us so neglected. It is imperative that we frequently “take soundings” of our lives. How tragic for us to allow ourselves into dangerous waters just because we have been careless about maintaining proper spirituality and negligent about moving closer to God. I am convinced that unfaithful attendance, immorality, materialism, apostasy, and a thousand other harmful things are allowed to grow in our lives because we have ceased getting a gauge of where we are in our personal, spiritual lives. Please keep taking those soundings and determine how deep or shallow your faith is!
The Preacher Pollard Blog 
To keep our hearts with all diligence all the time is our responsibility.
Yes indeed