13 When Jesus came to the region of Caesarea Philippi, he asked his disciples, “Who do people say that the Son of Man is?”[c]
14 “Well,” they replied, “some say John the Baptist, some say Elijah, and others say Jeremiah or one of the other prophets.”
15 Then he asked them, “But who do you say I am?”
16 Simon Peter answered, “You are the Messiah,[d] the Son of the living God.”
17 Jesus replied, “You are blessed, Simon son of John,[e] because my Father in heaven has revealed this to you. You did not learn this from any human being.
18 Now I say to you that you are Peter (which means ‘rock’),[f] and upon this rock I will build my church, and all the powers of hell[g] will not conquer it.
19 And I will give you the keys of the Kingdom of Heaven. Whatever you forbid[h] on earth will be forbidden in heaven, and whatever you permit[i] on earth will be permitted in heaven.”
Peter was not influenced by what others thought of Jesus. Peter had his personal revelation of truth of who Jesus is, which became the rock (strong foundation) that the devil could not prevail against.
In the same way, once we have a personal revelation from God of a particular truth (and not from others ) it becomes the very core/foundation of our christian walk which cannot be shaken. No persuasion or sweet talk can ever influence us to change our revelation- it is the truth that becomes an innate quality of us. We can suddenly become bold just like Peter and John who continued to preach the gospel despite being warned/threatened by the rulers, elders and teachers of the law (Acts 4:17-19) not to teach in Jesus' name. ..Because Peter and John caught the revelation of who Jesus is.
Once truth is revealed, repentance follows (which is basically a change in our way of thinking and hence renewal of the mind occurs).
Similarly, some of us may recall that before we came to know the Lord, we may have lots of wierd ideas about God and salvation. We may become frustrated and even angry when some christians started sharing the truth to us because the truth pricked our ego. But, once we catch the truth, we are able to change and acccept Him without any more resistance.
The revelation of grace, the new covenant way of life, for example, similarly has to come through a personal revelation from God. It cannnot be taught, it has to be caught. Otherwise there will be fruitless sessions of arguments and frustrations.
The Pharisees were not able to catch the revelation of the new order that would be coming when Jesus was on earth and happily stagnated with their old ways of doing things. Similarly, at times, we can be like the Pharisees when we are not sensitive to the Spirit's direction and happily follow our old fleshly ways.
Each one requires a personal revelation from Him about what grace and new covenant are all about. Paul prayed for his disciples that their eyes of their heart be enlightened (revelation) in order that.....
Ephesians 1 :15-23)
15 For this reason, ever since I heard about your faith in the Lord Jesus and your love for all the saints,
16 I have not stopped giving thanks for you, remembering you in my prayers.
17 I keep asking that the God of our Lord Jesus Christ, the glorious Father, may give you the Spirit[f] of wisdom and revelation, so that you may know him better.
18 I pray also that the eyes of your heart may be enlightened in order that you may know the hope to which he has called you, the riches of his glorious inheritance in the saints,
19 and his incomparably great power for us who believe. That power is like the working of his mighty strength,
20 which he exerted in Christ when he raised him from the dead and seated him at his right hand in the heavenly realms,
21 far above all rule and authority, power and dominion, and every title that can be given, not only in the present age but also in the one to come.
22 And God placed all things under his feet and appointed him to be head over everything for the church,
23 which is his body, the fullness of him who fills everything in every way.
When we are stagnating in our walk, when we are blinded (just like the Pharisees) by our traditions and ways of doing things, when we are walking in circles, it is perhaps time to ask for a fresh revelation from the Father.