Lorenzo Scupoli has written:

'An cath spioradail' -- subject(s): Doctrines, Early works to 1800, Catholic Church, Perfection, Spiritual life

'The spirituall conquest in five treatises, enabling all Christian warriers to conquer themselves, and come to a vicinity with God' -- subject(s): Christian life, Perfection

'Il Combattimento Spirituale' -- subject(s): Asceticism, Care of the sick, Catholic Church, Catholic authors, Christian life, Doctrines, Early works to 1800, Orthodox Eastern Church, Perfection, Perfection (Catholic), Religious aspects, Religious aspects of Care of the sick, Religious aspects of Perfection, Siritual life, Spiritual life

'Certamen spirituale ..' -- subject(s): Christenen, History, Mysticism, Spiritual life, Spiritualiteit

'The spiritual combat and peace of soul' -- subject(s): Catholic authors, Christian life, Perfection

'The Christian pilgrime in his spirituall conflict and spirituall conqvest' -- subject(s): Asceticism, Catholic Church, Early works to 1800, Perfection, Religious aspects of Perfection, Spiritual life

'The spiritvall conquest in five treatises, enabling all Christian warriers [sic] to conquer themselves, and come to a vicinity with God' -- subject(s): Christian life, Perfection

P. J. Stockman has written:

'Manual of Christian perfection' -- subject(s): Accessible book, Asceticism, Perfection, Catholic Church

Ralph Kendall Schwab has written:

'The history of the doctrine of Christian perfection in the Evangelical Association' -- subject(s): Evangelical Association of North America, Perfection

Harold William Perkins has written:

'The doctrine of Christian or evangelical perfection'

Not while they are on this earth in earthly bodies. A Christian will only reach perfection after he/she has gone on to be with the Lord. Christians commit sin all the time, but don't live in habitual sin and they confess their sin to God very frequently, to be in fellowship with Him. So by being sinful we can never be perfect on this earth.

We see the word perfect used in Scripture, but that means that we are becoming more mature in the Christian life, not becoming perfect.