A life of victory over sin, worldliness, and the evil one is evident in the life of a believer. By saying this, I am not implying that we will reach spiritual perfection as believers on earth. But we will have extraordinary victories over sin, through the power of the Holy Spirit.
To properly understand practical sanctification we have to take in consideration all the teachings in the Word concerning this topic. The verses below provide a short synthesis regarding practical sanctification.
11 Likewise you also, reckon yourselves to be dead indeed to sin, but alive to God in Christ Jesus our Lord. 12 Therefore do not let sin reign in your mortal body, that you should obey it in its lusts. 13 And do not present your members as instruments of unrighteousness to sin, but present yourselves to God as being alive from the dead, and your members as instruments of righteousness to God. 14 For sin shall not have dominion over you, for you are not under law but under grace.
Practical sanctification derives itself from our spiritual position of saints in Christ.
(1 Corinthians 1:2)
To the church of God which is at Corinth, to those who are sanctified in Christ Jesus, called to be saints, with all who in every place call on the name of Jesus Christ our Lord, both theirs and ours
Practical sanctification is made possible when the believer demonstrates fear of God.
(2 Corinthians 7:1)
Therefore, having these promises, beloved, let us cleanse ourselves from all filthiness of the flesh and spirit, perfecting holiness in the fear of God.