25 But whoso looketh into the perfect law of liberty, and continueth therein, he being not a forgetful hearer, but a doer of the work, this man shall be blessed in his deed.
THIS verse tells us how we can KNOW that we are real children of God just as the previous 2 verses told us how we can know just the opposite.
You see, GOD does not want you to be ignorant, or GUESSING or wondering if you have been born again and have HIS SEAL in your forehead preserved unto HIM forever as a child of HIS family... There are many scriptures which give us instructions and INDICATORS of what to look for and do inj our daily lives that if these things are present in our lives, then we can be assured that we are HIS and being LED by the Holy Spirit which dwells within every single believer.