1 John 3:19, 21-22

By this we will know [without any doubt] that we are of the truth, and will assure our heart and quiet our conscience before Him

Beloved, if our heart does not convict us [of guilt], we have confidence [complete assurance and boldness] before God; and we receive from Him whatever we ask because we [carefully and consistently] keep His commandments and do the things that are pleasing in His sight [habitually seeking to follow His plan for us].