‘(…) Wesley took the commands of Jesus to “be perfect as your heavenly Father is perfect” and to “love the Lord your God with all your heart and with all of your soul and with all of your strength and with all of your mind” with absolute seriousness (Mat. 5:48, Lk. 10:27). Not only did Wesley take the command seriously, he also believed that God had provided a way for Christians to fulfill the commands in this life. Although there are many Scriptures that could be used to support Wesley’s doctrine, he favored the many references in 1 John to love being perfected and Christians being cleansed from all sin.10 The possibility of perfect love can be seen in the following verses: “whoever keeps his word, in him truly the love of God is perfected,” and “by this is love perfected with us, so that we may have confidence for the day of judgment,” and “You know that he appeared in order to take away sins, and in him there is no sin” (1 Jn. 2:5, 3:5, 4:17; also see 1:7, 3:7, 4:18-19). (…)’
source: Josh Phillips, “Predestined to be Perfected in Love* ~ Pt. 2: What Christian Perfection is and What it is For” (notsohostilepentecostal).