though I myself have reason for confidence in the flesh also. If anyone else thinks he has reason for confidence in the flesh, I have more:  circumcised on the eighth day, of the people of Israel, of the tribe of Benjamin, a Hebrew of Hebrews; as to the law, a Pharisee;  as to zeal, a persecutor of the church; as to righteousness under the law, blameless.  But whatever gain I had, I counted as loss for the sake of Christ.  Indeed, I count everything as loss because of the surpassing worth of knowing Christ Jesus my Lord. For his sake I have suffered the loss of all things and count them as rubbish, in order that I may gain Christ  and be found in him, not having a righteousness of my own that comes from the law, but that which comes through faith in Christ, the righteousness from God that depends on faith—
(Philippians 3:4-9 ESV)
Apostle Paul recounts his past faith walk under the law as rubbish and boasts his new path of righteousness through Christ. Paul who was a Pharisee who lived a faith walk against the Word persecuted the followers of the Way (truth – John 14:6, John 1:17) and believed those actions were righteous to God (John 16:2, Acts 7:54-60, 8:1, Romans 10:1-3).
Graciously, Paul received the truth that was testified through Jesus (John 1:17). Throughout the book of Acts, Apostle Paul, no matter what others might say or do, does not follow man, other believer’s interpretation or man’s teachings but only follows the Way of truth.
 But this I confess to you, that according to the Way, which they call a sect, I worship the God of our fathers, believing everything laid down by the Law and written in the Prophets,
(Acts 24:14 ESV)
It didn’t matter if the Jews persecuted Paul for following the Way and called it a sect, Paul followed and believed in the Word and to him that was all that mattered.
Once again, the only thing that we could rely on is the Word, the only Way.
Photo Credit: http://ngm.nationalgeographic.com/ngm/photo-contest/2012/entries/wallpaper/nature-winners/#/1