We should be holy and without blame before him in love. The goal of our instruction is love from a pure heart. Like the holy one we should holy in all, all, all of our conduct. Who shall stand in the presence of the Lord accept he who has clean hands and a pure heart. Jesus is coming back for a church without spot, blemish, or wrinkle. Behold I am coming quickly my reward is with me to render to everybody according to what he has done.
3 But there must be no sexual sin among you, or any kind of evil or greed. Those things are not right for God’s holy people. 4 Also, there must be no evil talk among you, and you must not speak foolishly or tell evil jokes. These things are not right for you. Instead, you should be giving thanks to God. 5 You can be sure of this: No one will have a place in the kingdom of Christ and of God who sins sexually, or does evil things, or is greedy. Anyone who is greedy is serving a false god. Eph 5
Such doctrines that give a false security to the harlot christian are devil inspired teachings that do not conform us to godliness.
To be "Holy and without blame before him in love" means that you are "In Christ". It is Christ that makes us "Holy and without blame before him in love".